The document provides an overview of satellite systems and hacking vulnerabilities. It describes the basic components of satellite systems, including the satellite itself with its payload and bus, as well as tracking, telemetry and control ground stations. It discusses various satellite orbits, frequencies used for transmission, and the structure of very small aperture terminals (VSATs) and other scaled down ground stations. The document notes that while satellite systems have some redundancy to mitigate risks, their design also has elements of simplicity that could enable hacking, such as accessing unencrypted frequencies. However, fully hacking a satellite would require significant technical knowledge and resources.
This talk will provide an in-depth treatment of satellite telephony networks from a security perspective. The overall system seems secure, but in reality, it cannot be expected to be fully reliable.
We will briefly cover the satellite mobile system architecture, then discuss GMR (GEO-Mobile Radio) system elements, e.g. GSS (Gateway Station Subsystem), MES (Mobile Earth Station), AOC (Advanced Operation Center), and TCS (Traffic Control Subsystem) for GMR-1 systems and NCC (Network Control Center), GW (Gateway), SCF (Satellite Control Facility) and CMIS (Customer Management Information System) for GMR-2 systems.
From there, we will discuss the security issues of GMR system as it shares similar vulnerabilities with GSM–GMR is derived from the terrestrial digital cellular standard GSM and support access to GSM core networks, along with some interesting demos.
Time permitting, a question and answer session at the end of the presentation will allow participants to cover any additional issues in satellite telephony system they’d like to discuss.
This document provides an introduction to using the Google Earth Engine (GEE) platform and API for geospatial analysis. It outlines key concepts like accessing satellite imagery collections in GEE, applying common algorithms to analyze image data, and exporting outputs. The document then walks through a practical example of using Landsat imagery to calculate NDVI differences between 2000 and 2010 in California, demonstrating functions like filtering by date, applying reducers to composite images, performing band math, and masking outputs. It introduces important GEE concepts like variables, image collections, and sharing scripts.
Satellite Hacking — Intro by Indianz (2012)Jim Geovedi
A very good introduction by IndianZ (Martin Rutishauser) about Satellite Hacking. He also brought up some information that missed in my satellite hacking talks. Highly recommended for those who are interested in the subject.
This document discusses different methods for representing digital terrain, including grids, TINs, quadtrees, and multi-resolution models. Grid DEMs represent terrain as a regular grid of elevation postings. TINs use an irregular network of triangles to connect elevation postings. Quadtrees adapt resolution based on terrain complexity. Multi-resolution models provide multiple levels of detail for large terrain datasets. Each method has advantages like storage efficiency or terrain adaptation and disadvantages like processing costs or irregularity. The best method depends on the application and dataset characteristics.
This document summarizes different types of satellites and orbits. It defines a satellite as a solid object that revolves around another due to gravitational forces. Satellites are either passive, simply reflecting signals, or active with onboard processing equipment. The first artificial satellite was Sputnik 1, launched in 1957. Satellites in low-Earth orbit have shorter lifespans but provide better signals, while geostationary satellites remain fixed over one position from the ground. The document also briefly discusses Kepler's laws of planetary motion and their application to Earth.
1. Satellite orbits can be equatorial, polar, or inclined depending on their path above the Earth's surface. A geostationary orbit is equatorial with 0 inclination such that the satellite appears stationary from Earth.
2. Spatial, spectral, temporal, and radiometric resolutions describe the detail and information that can be detected by a satellite sensor. Higher resolutions allow for smaller features, narrower wavelength bands, more frequent revisits, and finer differences in energy to be observed.
3. Indian satellites carry sensors with characteristics suited to applications like agriculture, mapping, disaster monitoring, and defense. Their resolutions support tasks like resource monitoring, precision farming, and border security.
Mini, micro, and nanosatellites are classifications of small, low-mass satellites under 500 kg. Miniaturizing satellites reduces costs by requiring smaller, cheaper launch vehicles. They also allow for more missions like satellite constellations and university research. The nanosatellite market is growing rapidly, with over 1,000 projected to launch in the next five years. ISRO has launched several microsatellites to demonstrate new technologies and conduct academic research missions with lower costs.
This talk will provide an in-depth treatment of satellite telephony networks from a security perspective. The overall system seems secure, but in reality, it cannot be expected to be fully reliable.
We will briefly cover the satellite mobile system architecture, then discuss GMR (GEO-Mobile Radio) system elements, e.g. GSS (Gateway Station Subsystem), MES (Mobile Earth Station), AOC (Advanced Operation Center), and TCS (Traffic Control Subsystem) for GMR-1 systems and NCC (Network Control Center), GW (Gateway), SCF (Satellite Control Facility) and CMIS (Customer Management Information System) for GMR-2 systems.
From there, we will discuss the security issues of GMR system as it shares similar vulnerabilities with GSM–GMR is derived from the terrestrial digital cellular standard GSM and support access to GSM core networks, along with some interesting demos.
Time permitting, a question and answer session at the end of the presentation will allow participants to cover any additional issues in satellite telephony system they’d like to discuss.
This document provides an introduction to using the Google Earth Engine (GEE) platform and API for geospatial analysis. It outlines key concepts like accessing satellite imagery collections in GEE, applying common algorithms to analyze image data, and exporting outputs. The document then walks through a practical example of using Landsat imagery to calculate NDVI differences between 2000 and 2010 in California, demonstrating functions like filtering by date, applying reducers to composite images, performing band math, and masking outputs. It introduces important GEE concepts like variables, image collections, and sharing scripts.
Satellite Hacking — Intro by Indianz (2012)Jim Geovedi
A very good introduction by IndianZ (Martin Rutishauser) about Satellite Hacking. He also brought up some information that missed in my satellite hacking talks. Highly recommended for those who are interested in the subject.
This document discusses different methods for representing digital terrain, including grids, TINs, quadtrees, and multi-resolution models. Grid DEMs represent terrain as a regular grid of elevation postings. TINs use an irregular network of triangles to connect elevation postings. Quadtrees adapt resolution based on terrain complexity. Multi-resolution models provide multiple levels of detail for large terrain datasets. Each method has advantages like storage efficiency or terrain adaptation and disadvantages like processing costs or irregularity. The best method depends on the application and dataset characteristics.
This document summarizes different types of satellites and orbits. It defines a satellite as a solid object that revolves around another due to gravitational forces. Satellites are either passive, simply reflecting signals, or active with onboard processing equipment. The first artificial satellite was Sputnik 1, launched in 1957. Satellites in low-Earth orbit have shorter lifespans but provide better signals, while geostationary satellites remain fixed over one position from the ground. The document also briefly discusses Kepler's laws of planetary motion and their application to Earth.
1. Satellite orbits can be equatorial, polar, or inclined depending on their path above the Earth's surface. A geostationary orbit is equatorial with 0 inclination such that the satellite appears stationary from Earth.
2. Spatial, spectral, temporal, and radiometric resolutions describe the detail and information that can be detected by a satellite sensor. Higher resolutions allow for smaller features, narrower wavelength bands, more frequent revisits, and finer differences in energy to be observed.
3. Indian satellites carry sensors with characteristics suited to applications like agriculture, mapping, disaster monitoring, and defense. Their resolutions support tasks like resource monitoring, precision farming, and border security.
Mini, micro, and nanosatellites are classifications of small, low-mass satellites under 500 kg. Miniaturizing satellites reduces costs by requiring smaller, cheaper launch vehicles. They also allow for more missions like satellite constellations and university research. The nanosatellite market is growing rapidly, with over 1,000 projected to launch in the next five years. ISRO has launched several microsatellites to demonstrate new technologies and conduct academic research missions with lower costs.
The document discusses various types of satellite orbits. It explains that low Earth orbit ranges from 600-1000 km from the Earth's surface. Satellites in these orbits circle the Earth every 90 minutes. Their orbits can be either ascending, moving south to north, or descending, moving north to south, when crossing the equator. Many Earth observation satellites use a sun-synchronous polar orbit, which keeps the satellite in the same position relative to the sun as it circles the Earth 16 times per day.
[unofficial] Pyramid Scene Parsing Network (CVPR 2017)Shunta Saito
Pyramid Scene Parsing Network introduces the Pyramid Pooling Module to improve semantic segmentation. The module captures context at different regions and scales by performing average pooling at different pyramid levels on the final convolutional feature map. Experiments on ADE20K and PASCAL VOC datasets show the Pyramid Pooling Module improves mean Intersection-over-Union by over 4% compared to global average pooling, achieving state-of-the-art performance.
Current & Future Spaceborne Sar Systemsgpetrie
This document summarizes current and future spaceborne synthetic aperture radar (SAR) systems. It reviews SAR systems by wavelength/frequency used and resulting ground resolution, including X-band, C-band, S-band, and L-band systems. It describes technological developments that have enabled smaller, less expensive SAR satellites. Many countries have recently launched or plan to launch X-band SAR satellites for civil and military use. Continuity of C-band SAR is ensured by Radarsat-2 and upcoming RISAT and Sentinel-1.
Land use/land cover classification using machine learning modelsIJECEIAES
An ensemble model has been proposed in this work by combining the extreme gradient boosting classification (XGBoost) model with support vector machine (SVM) for land use and land cover classification (LULCC). We have used the multispectral Landsat-8 operational land imager sensor (OLI) data with six spectral bands in the electromagnetic spectrum (EM). The area of study is the administrative boundary of the twin cities of Odisha. Data collected in 2020 is classified into seven land use classes/labels: river, canal, pond, forest, urban, agricultural land, and sand. Comparative assessments of the results of ten machine learning models are accomplished by computing the overall accuracy, kappa coefficient, producer accuracy and user accuracy. An ensemble classifier model makes the classification more precise than the other state-of-the-art machine learning classifiers.
Remote Sensing and GIS for Natural Hazards Assessment and Disaster Risk Manag...Cees van Westen
This document provides an overview of remote sensing and GIS techniques for natural hazard assessment and disaster risk management. It discusses how geo-information science and earth observation can be used to generate inventories of past hazardous events, model hazards, map elements at risk, and integrate these data to model potential losses. Hazard and risk assessments are conducted at multiple scales using spatial data on hazards, environmental factors, elements at risk, and causal factors. Remote sensing provides input for hazard modeling like topography, geology, and land cover. GIS allows storage, analysis, modeling, and visualization of spatial and temporal data in an integrated approach to disaster risk management.
We show how deep learning can be effectively applied to remote sensing. Many problems we faced, solutions we have had discovered were highlighted too. Remotely sensed data, unlike other vision tasks are very challenging and posses extra difficulties. Objects are very small compared to the image size, and even small pixel sizes of 8*10 pixel can contain huge amount of informations.
To the best of our knowledge there is no automated or simi-automated tool that uses deep learning to detect features from satellite imagery.
THE SENTINEL-1 MISSION AND ITS APPLICATION CAPABILITIESgrssieee
The Sentinel-1 mission is part of the GMES program and consists of two satellites to provide C-band SAR data for emergency response, marine and land monitoring, and other applications. The satellites operate in a near-polar orbit with a 12 day repeat cycle. The main acquisition mode is an interferometric wide swath mode with 5m range and 20m azimuth resolution over a 250km swath. Sentinel-1 will support operational services and create a long-term SAR data archive.
ENVI is software that allows users to read, prepare, explore, analyze and share geospatial imagery. It supports various imagery formats and sensor types. The software provides tools for orthorectifying, registering, calibrating and correcting imagery. It also allows users to classify imagery, extract features, calculate statistics, and customize the software using IDL scripting. Processed imagery can be output to common formats for collaboration.
Flood risk mapping using GIS and remote sensing and SARRohan Tuteja
This document summarizes a presentation on using synthetic aperture radar (SAR) data from RADARSAT-1 to map flooding in Kendrapara District, India. SAR data from four dates in September 2008 were used to map the spatial extent and temporal progression of flooding over time. Traditional flood mapping methods are time-consuming and difficult during floods, while SAR data can penetrate clouds and capture flooding regardless of weather conditions. The methodology involved preprocessing the SAR data, removing noise, correcting geometrically, and classifying images to map flooding and analyze how floodwaters spread over the four dates. Peak flooding occurred on September 22nd, affecting over 37,400 hectares. The results demonstrate how SAR data can effectively monitor flooding and inform disaster response
Application of Google Earth Engine in Open NAPsNAP Events
Google Earth Engine (GEE) is a tool that allows users to perform large-scale data analysis on geospatial datasets from various sources. It allows for highly interactive algorithm development at a global scale using large amounts of data quickly and efficiently. The document provides examples and exercises for users to get started with GEE, including printing text, filtering image collections, defining functions, exploring example scripts, clipping images, and visualizing nighttime lights data. Real-world applications mentioned include using GEE for forestry and other environmental fields.
This document provides a short introduction to Geographic Information Systems (GIS). It discusses the purposes of GIS, including using GIS to understand phenomena that have both geographic and temporal dimensions. It also describes how GIS allows users to enter, analyze, and present georeferenced data. The document outlines how GIS represents real world features through models like maps and databases and discusses spatial databases specifically. It positions GIS as existing at the intersection of geography and information science and technology.
El documento describe la historia, tipos, aplicaciones y importancia de los satélites artificiales. Explica que los primeros satélites artificiales fueron lanzados por la Unión Soviética y Estados Unidos en la década de 1950 y que ahora hay miles en órbita con aplicaciones como comunicaciones, observación meteorológica y militar. También menciona los satélites venezolanos Simón Bolívar, Miranda y el próximo Sucre.
This document is a thesis submitted by Gagandeep Singh for his M.Tech degree in RS & GIS from NIT Warangal in 2013-2015. It discusses various topics related to digital terrain modeling including contour lines, grid DTMs, TINs, the differences between DSMs and DEMs, data acquisition methods, processing techniques, and applications of digital terrain data. It also evaluates different data sources for terrain modeling like SRTM, topographic maps, and Google Earth imagery and assesses their accuracy through statistical analysis and visual inspection.
A GEO satellite’s distance from earth gives it a large coverage area, almost a fourth of the earth’s surface and also have 24 hour view of a particular area.This will be very helpful to army,navy etc.,These factors make it ideal for satellite broadcast and other multipoint applications.Continuous monitoring is done and also cost effective in long term, risk-less.
Satellite technology has progressed significantly over the last 50 years and now provides broadband communications, audio/video distribution, navigation, customer service, and military applications. Satellites play an important role in emerging 4G infrastructure and the vision of connectivity anywhere, anytime. Satellites orbit Earth and help with communication, mapping weather, TV, internet, and phone services. There are three main types of orbits - low Earth orbit (LEO), medium Earth orbit (MEO), and geostationary Earth orbit (GEO).
This presentation covers:
Basics of Satellite communication
Indian Communication satellites
Satellite link and elements of satellite communication
Frequency bands of satellite communication
Different orbits of satellite communication
Link budget calculations
This document provides an introduction to geographic information systems (GIS). It defines GIS as a computer system for capturing, storing, analyzing and displaying spatially-referenced data. A GIS integrates database operations with maps in digital form and allows users to create interactive queries, analyze spatial information, edit maps and present results. The document outlines key components of a GIS including data, databases, processing capabilities, hardware and communications. It also discusses the importance of location in problem-solving and decision making as well as the history and business applications of GIS technology.
The document summarizes recent developments in airborne laser scanning technologies. It discusses improvements such as increased data acquisition rates enabled by higher pulse repetition rates and scan rates. It also covers developments like multiple return recording and full waveform digitization. Integration of digital cameras to provide higher quality imagery is also described. Overall, technologies have advanced to allow for higher point densities, altitudes, and accuracies in airborne laser scanning systems.
Landsat was a joint NASA/USGS satellite program designed to systematically acquire global land surface images. Landsat 1 was launched in 1972 as the first satellite dedicated to observing Earth's land areas. Subsequent Landsat satellites carried improved sensors with higher spatial, spectral, and radiometric resolutions. Landsat provides repetitive coverage of the entire global land mass with images useful for mapping and monitoring land use change over time.
Hacking a Bird in the Sky: The Revenge of Angry BirdsJim Geovedi
The document discusses satellite communication systems and potential vulnerabilities. It describes how VSAT networks are used to provide services like automated teller machines and banking networks. It then outlines some hypothetical attacks against different parts of satellite systems, including denial of service attacks against uplinks and downlinks, commandeering spare satellites, and spoofing orbital positioning. The document cautions that insiders pose the biggest risk, and discusses frameworks for distributed scanning of satellites to identify vulnerabilities early. It advocates for monitoring spectrum usage and carrier signals to detect anomalies.
The document discusses various types of satellite orbits. It explains that low Earth orbit ranges from 600-1000 km from the Earth's surface. Satellites in these orbits circle the Earth every 90 minutes. Their orbits can be either ascending, moving south to north, or descending, moving north to south, when crossing the equator. Many Earth observation satellites use a sun-synchronous polar orbit, which keeps the satellite in the same position relative to the sun as it circles the Earth 16 times per day.
[unofficial] Pyramid Scene Parsing Network (CVPR 2017)Shunta Saito
Pyramid Scene Parsing Network introduces the Pyramid Pooling Module to improve semantic segmentation. The module captures context at different regions and scales by performing average pooling at different pyramid levels on the final convolutional feature map. Experiments on ADE20K and PASCAL VOC datasets show the Pyramid Pooling Module improves mean Intersection-over-Union by over 4% compared to global average pooling, achieving state-of-the-art performance.
Current & Future Spaceborne Sar Systemsgpetrie
This document summarizes current and future spaceborne synthetic aperture radar (SAR) systems. It reviews SAR systems by wavelength/frequency used and resulting ground resolution, including X-band, C-band, S-band, and L-band systems. It describes technological developments that have enabled smaller, less expensive SAR satellites. Many countries have recently launched or plan to launch X-band SAR satellites for civil and military use. Continuity of C-band SAR is ensured by Radarsat-2 and upcoming RISAT and Sentinel-1.
Land use/land cover classification using machine learning modelsIJECEIAES
An ensemble model has been proposed in this work by combining the extreme gradient boosting classification (XGBoost) model with support vector machine (SVM) for land use and land cover classification (LULCC). We have used the multispectral Landsat-8 operational land imager sensor (OLI) data with six spectral bands in the electromagnetic spectrum (EM). The area of study is the administrative boundary of the twin cities of Odisha. Data collected in 2020 is classified into seven land use classes/labels: river, canal, pond, forest, urban, agricultural land, and sand. Comparative assessments of the results of ten machine learning models are accomplished by computing the overall accuracy, kappa coefficient, producer accuracy and user accuracy. An ensemble classifier model makes the classification more precise than the other state-of-the-art machine learning classifiers.
Remote Sensing and GIS for Natural Hazards Assessment and Disaster Risk Manag...Cees van Westen
This document provides an overview of remote sensing and GIS techniques for natural hazard assessment and disaster risk management. It discusses how geo-information science and earth observation can be used to generate inventories of past hazardous events, model hazards, map elements at risk, and integrate these data to model potential losses. Hazard and risk assessments are conducted at multiple scales using spatial data on hazards, environmental factors, elements at risk, and causal factors. Remote sensing provides input for hazard modeling like topography, geology, and land cover. GIS allows storage, analysis, modeling, and visualization of spatial and temporal data in an integrated approach to disaster risk management.
We show how deep learning can be effectively applied to remote sensing. Many problems we faced, solutions we have had discovered were highlighted too. Remotely sensed data, unlike other vision tasks are very challenging and posses extra difficulties. Objects are very small compared to the image size, and even small pixel sizes of 8*10 pixel can contain huge amount of informations.
To the best of our knowledge there is no automated or simi-automated tool that uses deep learning to detect features from satellite imagery.
THE SENTINEL-1 MISSION AND ITS APPLICATION CAPABILITIESgrssieee
The Sentinel-1 mission is part of the GMES program and consists of two satellites to provide C-band SAR data for emergency response, marine and land monitoring, and other applications. The satellites operate in a near-polar orbit with a 12 day repeat cycle. The main acquisition mode is an interferometric wide swath mode with 5m range and 20m azimuth resolution over a 250km swath. Sentinel-1 will support operational services and create a long-term SAR data archive.
ENVI is software that allows users to read, prepare, explore, analyze and share geospatial imagery. It supports various imagery formats and sensor types. The software provides tools for orthorectifying, registering, calibrating and correcting imagery. It also allows users to classify imagery, extract features, calculate statistics, and customize the software using IDL scripting. Processed imagery can be output to common formats for collaboration.
Flood risk mapping using GIS and remote sensing and SARRohan Tuteja
This document summarizes a presentation on using synthetic aperture radar (SAR) data from RADARSAT-1 to map flooding in Kendrapara District, India. SAR data from four dates in September 2008 were used to map the spatial extent and temporal progression of flooding over time. Traditional flood mapping methods are time-consuming and difficult during floods, while SAR data can penetrate clouds and capture flooding regardless of weather conditions. The methodology involved preprocessing the SAR data, removing noise, correcting geometrically, and classifying images to map flooding and analyze how floodwaters spread over the four dates. Peak flooding occurred on September 22nd, affecting over 37,400 hectares. The results demonstrate how SAR data can effectively monitor flooding and inform disaster response
Application of Google Earth Engine in Open NAPsNAP Events
Google Earth Engine (GEE) is a tool that allows users to perform large-scale data analysis on geospatial datasets from various sources. It allows for highly interactive algorithm development at a global scale using large amounts of data quickly and efficiently. The document provides examples and exercises for users to get started with GEE, including printing text, filtering image collections, defining functions, exploring example scripts, clipping images, and visualizing nighttime lights data. Real-world applications mentioned include using GEE for forestry and other environmental fields.
This document provides a short introduction to Geographic Information Systems (GIS). It discusses the purposes of GIS, including using GIS to understand phenomena that have both geographic and temporal dimensions. It also describes how GIS allows users to enter, analyze, and present georeferenced data. The document outlines how GIS represents real world features through models like maps and databases and discusses spatial databases specifically. It positions GIS as existing at the intersection of geography and information science and technology.
El documento describe la historia, tipos, aplicaciones y importancia de los satélites artificiales. Explica que los primeros satélites artificiales fueron lanzados por la Unión Soviética y Estados Unidos en la década de 1950 y que ahora hay miles en órbita con aplicaciones como comunicaciones, observación meteorológica y militar. También menciona los satélites venezolanos Simón Bolívar, Miranda y el próximo Sucre.
This document is a thesis submitted by Gagandeep Singh for his M.Tech degree in RS & GIS from NIT Warangal in 2013-2015. It discusses various topics related to digital terrain modeling including contour lines, grid DTMs, TINs, the differences between DSMs and DEMs, data acquisition methods, processing techniques, and applications of digital terrain data. It also evaluates different data sources for terrain modeling like SRTM, topographic maps, and Google Earth imagery and assesses their accuracy through statistical analysis and visual inspection.
A GEO satellite’s distance from earth gives it a large coverage area, almost a fourth of the earth’s surface and also have 24 hour view of a particular area.This will be very helpful to army,navy etc.,These factors make it ideal for satellite broadcast and other multipoint applications.Continuous monitoring is done and also cost effective in long term, risk-less.
Satellite technology has progressed significantly over the last 50 years and now provides broadband communications, audio/video distribution, navigation, customer service, and military applications. Satellites play an important role in emerging 4G infrastructure and the vision of connectivity anywhere, anytime. Satellites orbit Earth and help with communication, mapping weather, TV, internet, and phone services. There are three main types of orbits - low Earth orbit (LEO), medium Earth orbit (MEO), and geostationary Earth orbit (GEO).
This presentation covers:
Basics of Satellite communication
Indian Communication satellites
Satellite link and elements of satellite communication
Frequency bands of satellite communication
Different orbits of satellite communication
Link budget calculations
This document provides an introduction to geographic information systems (GIS). It defines GIS as a computer system for capturing, storing, analyzing and displaying spatially-referenced data. A GIS integrates database operations with maps in digital form and allows users to create interactive queries, analyze spatial information, edit maps and present results. The document outlines key components of a GIS including data, databases, processing capabilities, hardware and communications. It also discusses the importance of location in problem-solving and decision making as well as the history and business applications of GIS technology.
The document summarizes recent developments in airborne laser scanning technologies. It discusses improvements such as increased data acquisition rates enabled by higher pulse repetition rates and scan rates. It also covers developments like multiple return recording and full waveform digitization. Integration of digital cameras to provide higher quality imagery is also described. Overall, technologies have advanced to allow for higher point densities, altitudes, and accuracies in airborne laser scanning systems.
Landsat was a joint NASA/USGS satellite program designed to systematically acquire global land surface images. Landsat 1 was launched in 1972 as the first satellite dedicated to observing Earth's land areas. Subsequent Landsat satellites carried improved sensors with higher spatial, spectral, and radiometric resolutions. Landsat provides repetitive coverage of the entire global land mass with images useful for mapping and monitoring land use change over time.
Hacking a Bird in the Sky: The Revenge of Angry BirdsJim Geovedi
The document discusses satellite communication systems and potential vulnerabilities. It describes how VSAT networks are used to provide services like automated teller machines and banking networks. It then outlines some hypothetical attacks against different parts of satellite systems, including denial of service attacks against uplinks and downlinks, commandeering spare satellites, and spoofing orbital positioning. The document cautions that insiders pose the biggest risk, and discusses frameworks for distributed scanning of satellites to identify vulnerabilities early. It advocates for monitoring spectrum usage and carrier signals to detect anomalies.
This document provides the class schedule for the Department of Mathematics Education at FMIPA UNY for February to June 2014. It lists the course codes, class times, rooms, instructors, and course titles for each class. There are classes scheduled every day from 7:00-17:00 with most classes lasting 1 hour and 40 minutes. Courses include those in mathematics, education, English, and computer science. The schedule shows the courses assigned to different student cohorts, including the 2012, 2013, and 2011 batches.
The busy author's guide to popularity and profit on pinterestBestsellerSociety
The document provides tips and strategies for using Pinterest effectively for authors. It discusses how to set up a Pinterest profile in 10 easy steps, including signing up, creating boards, and pinning content. It also lists 7 free tools that can help supercharge pinning on Pinterest, such as tools for creating pinnable images, tracking website traffic from Pinterest, and scheduling pins in advance. Finally, it lists 11 places authors can find free and legal photos to use on their blogs and websites.
El documento discute cómo Pedro enseñó que los cristianos enfrentan mucha oposición y presión de los no creyentes, pero que deben nutrir su fe con las promesas de Dios que vencen el escepticismo y la tentación. Los creyentes deben vivir de acuerdo a la voluntad de Dios a pesar de la burla y persecución, y deben ayudar a otros creyentes que también enfrentan presión.
Este documento contiene 4 enlaces a recursos educativos en línea, incluyendo sitios web de una universidad y organizaciones educativas, así como presentaciones y videos instructivos.
HostileWRT is an OpenWRT-based project that aims to automate wireless network auditing and attacks. It includes scripts to quickly crack WEP networks using aircrack-ng and supports running in access point, client, and monitor modes. Future plans include adding a web UI, improving support for resistant WEP networks, and potentially exploiting WPA networks using the Kalk cryptography tool. The project developers are seeking help from developers, testers, and experts to advance the tool's capabilities and conduct real-world testing.
The ALCON CT 7 is a modular point-to-point or point-to-mobile two-way radio system with a base unit and remote/mobile unit. It features excellent signal quality, 40 channels, a scrambler function, and compatibility with fax/data equipment. The system has upgraded modem speeds, RF stability, and a frequency range of 256.100-382.100 MHz with transmission power of 5W and sensitivity of -125dBm.
Hermes Trismegistus was a legendary Egyptian sage from around 2670 BC who is considered one of the greatest men of all time. He was known as "Thrice Great" and was said to have written many books on theology, philosophy, and medicine that have been lost. The writings and teachings attributed to Hermes, known as Hermetic philosophy, were studied by great Greek philosophers and influenced many ancient mysteries. The core principles of Hermetic philosophy that have endured include the concepts of mentalism, correspondence, vibration, polarity, rhythm, cause and effect, and gender. Studying Hermes' esoteric teachings requires careful analysis to understand their mystical nature and influence on spiritual traditions.
The SCA Group is a scaffolding and rope access company comprised of four divisions providing services across the UK and internationally. It was founded in 1996 and has since expanded to offer specialized services including marine scaffolding, containment solutions, commercial scaffolding, and rope access through divisions like SCA Marine, SCA Protect, SCA Commercial Scaffolding, and SCA Special Projects. The company is committed to building partnerships through high quality workmanship and safety.
Jeffery Karl is a senior-level continuous improvement professional with experience leading multi-million dollar projects using Lean Six Sigma methodologies. He currently works as the Director of Continuous Improvement at Nationwide Financial Services, where he developed their continuous improvement program, trained over 100 associates, and led projects saving over $500,000 annually. Previously, he worked at Cardinal Health leading Six Sigma projects saving over $3 million and introducing new strategies.
Heat Recovery, Pumps & Renewables
Heat Recovery and Heat Pump units both capture and/or convert naturally occurring energy and use this as a power source for either your building's ventilation, heating or hot water.
Both are proven renewable technologies and have been used throughout the heating and cooling industry for decades. Recent advances have made them ideal for both commercial and domestic use. Both can greatly reduce CO² emissions and energy costs.
Our heat recovery units are designed to save energy and improve indoor air quality by recovering heat from the transfer of warm air to cold air via exchangers. Similarly, our air source heat pumps are designed to provide hot water to either traditional radiators or under floor heating systems by converting outdoor air to heat energy.
An effective building ventilation solution has become critical in recent years as a result of increased levels of insulation and air tightness in residential and commercial buildings. Factors such as ever increasing energy costs, modern construction methods and building regulations have ultimately led to poor indoor climates that can cause health problems for occupants and damaging long term effects to the fabric of a building.
Our Duplexvent commercial heat recovery units are designed to save your business energy and improve the indoor air quality. These units provide ventilation and heat recovery (for commercial and industrial areas) by using polypropylene exchangers which recover heat from the transfer of warm air to cold air via exchangers with high conductivity and performance.
Technology
Heat recovery technology works by a process of continuously preheating an incoming cool supply air by warming it with the outgoing exhaust air. Warm air is not simply exhausted through the open window but transfers most of its heat to the supply air in a highly efficient heat recovery exchanger before being exhausted (at no time do the airstreams mix as the heat radiates through the plates of the exchanger).
Fresh air is fed directly from the outside into the ventilation system through a filter. The heat taken from the extracted air is used to warm the fresh filtered air in the exchanger and then flows through ducting. By undercutting doors and fitting transfer grilles, fresh air circulation is ensured throughout the dwelling.
The document is the Department of Defense's 2009 Strategic Management Plan. It outlines five business priorities for the DoD: 1) Support the All-Volunteer Force, 2) Support Contingency Business Operations, 3) Reform the DoD Acquisition and Support Processes, 4) Enhance the Civilian Workforce, and 5) Strengthen DoD Financial Management. For each priority, it lists goals, performance measures, and key initiatives to improve the efficiency and effectiveness of DoD business operations.
This document provides information about Hunting's Sales Agent. It lists their lines of business as product supply of seamless pipes/OCTG and product agencies for various premium connections and couplings for OCTG. It also lists their contacts at PT. SMB Synergy in Jakarta, Indonesia, including phone numbers and emails for the Business Development Manager and Operation Manager. Finally, it lists some of their major customers in Indonesia such as Pertamina EP, Medco E&P Indonesia, CNOOC, Chevron, and others.
This document summarizes residence hall policies and procedures at the University of Louisiana at Lafayette. It outlines policies regarding access to residence halls using student ID cards, guest registration, open house hours, overnight guests, unlock door fees, stairwell access, and sanctions for policy violations. It also provides contact information for housing staff and describes the services and critical safety resources offered by the University Police Department, including 24/7 patrols, emergency call boxes, surveillance cameras, restricted access to buildings, and emergency notification systems.
Santa Biblia
Antiguo Testamento
Nuevo Testamento
Escuela Sabática
Cuarto Trimestre del 2016
Guía de Estudio de la Biblia
El Libro de Job
GRES
Guía para el Repaso de Escuela Sabática
Material de apoyo
Estudio Bíblico inductivo de la Palabra de Dios
Iglesia Adventista del Séptimo Día
This document provides an overview of the open world survival game "Deserted". The game puts players in the role of a plane crash survivor on an island who must use skills like fire-building, hunting, and crafting to find shelter, food and defend against predators while searching for a way to escape the island. Players can explore the open world map and encounter different climates and locations as they work to complete the objective of escaping civilization.
Satellites play a significant role in communication, early warning systems, global broadcasting, meteorology, navigation, reconnaissance, remote sensing, and surveillance.Satellite services cover practically every sector, from mobile cellular communication to telemedicine, so any interference with them could have a serious effect. Satellites are a strategic asset for any country and are considered as “critical infrastructure,” therefore they are considerable as privileged targets for a possible cyber attack.
Satellite communication systems allow signals to be transmitted and received via satellites orbiting Earth. Key elements include the space segment consisting of satellites and the ground segment of earth stations. Satellites transmit signals in various frequency bands. Applications include internet access, environmental monitoring, disaster management, television and radio broadcasting, broadband internet, and military communications. While satellites provide global coverage, disadvantages include high capital costs and signal propagation delays. Satellite technology is crucial for many areas of modern society and communications.
The document discusses various types of satellites and their applications. It describes communications satellites that enable broadband internet, direct broadcasting, and fixed satellite services. It also covers earth observation satellites used for environmental monitoring, agriculture, forestry, geology, and risk management. These satellites observe the Earth's surface and collect data on topics like climate, natural resources, and natural disasters. Finally, the document lists reconnaissance satellites, astronomical satellites, weather satellites, and navigation satellites as other major categories of satellites and their purposes.
This document provides an overview of optical satellite communications, including intersatellite links (ISLs) and global achievements. It discusses how ISLs allow for increased capacity and coverage by connecting satellites in different orbits, such as GEO-LEO and GEO-GEO links. Optical communications provide advantages over radio links, including higher antenna gains due to shorter wavelengths, but require more accurate pointing and tracking. The document outlines examples of optical ISL applications and global satellite networks using interconnected satellites.
A satellite system is a set of gravitationally bound objects in orbit around a planetary-mass object or minor planet, or its barycenter. Generally speaking, it is a set of natural satellites (moons), although such systems may also consist of bodies such as circumplanetary disks, ring systems, moonlets, minor-planet moons, and artificial satellites any which may themselves have satellite systems of their own.
Satellite communication involves transmitting information from one location to another using an artificial satellite orbiting Earth. A communication satellite receives signals from transmitting ground stations, amplifies and processes the signals, and transmits them back to receiving ground stations on Earth. The key components of satellite communication systems are the space segment, consisting of the satellite, and the ground segment, consisting of transmitting and receiving earth stations.
number of lines should be included in the last page of the paper aft.pdfsktambifortune
number of lines should be included in the last page of the paper after References.
Assessment- Marks will be awarded for compliance with format specifications, organization and
use of proper section headings and content.
Warning- While you are free to source and use materials from the Internet, you must not copy
these works verbatim. In addition you must not copy your classmate\'s work. The penalty for
copying for the offender and the author of the copied work is severe. Protect your paper from
plagiarism . Investigate modern Digital Satellite Communications Systems. Satellite
communication systems are used to relay radio transmissions between earth terminals. A typical
operational link involves an active satellite and two or more earth terminals. One station
transmits to the satellite on a frequency called the UP-LINK frequency. The Saellite then
amplifies the signal, converts it to the DOWN-LINK frequency, and transmits it back to earth.
Your paper titled Digital Satellite Communication Systems should conform to the specifications
and format gixen below Specifications and Format: Reference Report Size Paper Font
CSC422/2015-16 Not less than 3500 words and not more than 4000 A4 Times New Roman,
(Title: Size 14, Heading: Size 13, Sub heading: Size 12, Text: Size 9) Heading Frt Single
Column Center Justification Title on a new Line Name on a new line Address on a new line
Reference on a new line Double Column, ruil Justitication Left2o5m. Right2.5cm. Top 2.5cm
and Bottom 2.5cm Single Page Format Page Margin Line Spacing A sample of the heading is
shown below Digital Satellite Communication Systems by Kaxade Adeleke Matriculation
Number 120805012) Department ofCompuer Sciences Uhiversity of Lagas (Ref CSC422/2014-
15) Your paper should have the following headings: Abstract, Introduction, Other Sections,
Conclusion, References and Document Statistics. Do not use a separate page for your title. The
coverage of the topic with well thought sections carries the bulk of awarded marks. Therefore,
organize your sections carefully for maximum coverage of topic and good effect Document
statistics - Word count, number of pages, number of paragraphs and
Solution
ANSWER-A communicaton satellite is an artificial satellite that relays and amplifies radio
telecommunications signals via a transponder; it creates acommunication channel between a
source transmitter and a receiver at different locations on Earth. Communications satellites are
used for television, telephone, radio, internet, and military applications. There are over 2,000
communications satellites in Earth’s orbit, used by both private and government
organizationsWireless communication uses electromagnetic waves to carry signals. These waves
require line-of-sight, and are thus obstructed by the curvature of the Earth. The purpose of
communications satellites is to relay the signal around the curve of the Earth allowing
communication between widely separated points.[2] Communications satellites use .
number of lines should be included in the last page of the paper aft.pdfkostikjaylonshaewe47
number of lines should be included in the last page of the paper after References.
Assessment- Marks will be awarded for compliance with format specifications, organization and
use of proper section headings and content.
Warning- While you are free to source and use materials from the Internet, you must not copy
these works verbatim. In addition you must not copy your classmate\'s work. The penalty for
copying for the offender and the author of the copied work is severe. Protect your paper from
plagiarism . Investigate modern Digital Satellite Communications Systems. Satellite
communication systems are used to relay radio transmissions between earth terminals. A typical
operational link involves an active satellite and two or more earth terminals. One station
transmits to the satellite on a frequency called the UP-LINK frequency. The Saellite then
amplifies the signal, converts it to the DOWN-LINK frequency, and transmits it back to earth.
Your paper titled Digital Satellite Communication Systems should conform to the specifications
and format gixen below Specifications and Format: Reference Report Size Paper Font
CSC422/2015-16 Not less than 3500 words and not more than 4000 A4 Times New Roman,
(Title: Size 14, Heading: Size 13, Sub heading: Size 12, Text: Size 9) Heading Frt Single
Column Center Justification Title on a new Line Name on a new line Address on a new line
Reference on a new line Double Column, ruil Justitication Left2o5m. Right2.5cm. Top 2.5cm
and Bottom 2.5cm Single Page Format Page Margin Line Spacing A sample of the heading is
shown below Digital Satellite Communication Systems by Kaxade Adeleke Matriculation
Number 120805012) Department ofCompuer Sciences Uhiversity of Lagas (Ref CSC422/2014-
15) Your paper should have the following headings: Abstract, Introduction, Other Sections,
Conclusion, References and Document Statistics. Do not use a separate page for your title. The
coverage of the topic with well thought sections carries the bulk of awarded marks. Therefore,
organize your sections carefully for maximum coverage of topic and good effect Document
statistics - Word count, number of pages, number of paragraphs and
Solution
ANSWER-A communicaton satellite is an artificial satellite that relays and amplifies radio
telecommunications signals via a transponder; it creates acommunication channel between a
source transmitter and a receiver at different locations on Earth. Communications satellites are
used for television, telephone, radio, internet, and military applications. There are over 2,000
communications satellites in Earth’s orbit, used by both private and government
organizationsWireless communication uses electromagnetic waves to carry signals. These waves
require line-of-sight, and are thus obstructed by the curvature of the Earth. The purpose of
communications satellites is to relay the signal around the curve of the Earth allowing
communication between widely separated points.[2] Communications satellites use .
Simulation of the Earth’s radio-leakage from mobile towers as seen from selec...Sérgio Sacani
Mobile communication towers represent a relatively new but growing contributor to the total radio leakage associated with
planet Earth. We investigate the overall power contribution of mobile communication towers to the Earth’s radio leakage budget,
as seen from a selection of different nearby stellar systems. We created a model of this leakage using publicly available data of
mobile tower locations. The model grids the surface of the planet into small, computationally manageable regions, assuming
a simple integrated transmission pattern for the mobile antennas. In this model, these mobile tower regions rise and set as the
Earth rotates. In this way, a dynamic power spectrum of the Earth was determined, summed over all cellular frequency bands.
We calculated this dynamic power spectrum from three different viewing points - HD 95735, Barnard’s star, and Alpha Centauri
A. Our preliminary results demonstrate that the peak power leaking into space from mobile towers is ∼ 4GW. This is associated
with LTE mobile tower technology emanating from the East Coast of China as viewed from HD 95735. We demonstrate that
the mobile tower leakage is periodic, direction dependent, and could not currently be detected by a nearby civilisation located
within 10 light years of the Earth, using instrumentation with a sensitivity similar to the Green Bank Telescope (GBT). We plan
to extend our model to include more powerful 5G mobile systems, radar installations, ground based up-links (including the Deep
Space Network), and various types of satellite services, including low-Earth orbit constellations such as Starlink and OneWeb.
TVRO SYSTEM
Project Report of Television Receive Only System implementation at Institute premises. Related to Satellite Communication
Want to purchase the content ? e-mail on dulith1989@gmail.com
Development of satellite technology and its impact on social lifeAlexander Decker
Satellite technology has evolved over time from early experimental satellites like Telstar to modern geostationary communication satellites. It has had major impacts on social life by enabling global telecommunications. The key concepts are defined, including the components of a satellite system like the satellite itself, earth stations, and different types of orbits. The development of satellite technology is reviewed from early proposals and experiments to the establishment of systems like Intelsat and domestic satellite networks.
Orbits : types of satellites : frequency used link establishment, MA techniques used in satellite communication, earth station; aperture actuators used in satellite – Intelsat and Insat: fibers – types:
sources, detectors used, digital filters, optical link: power line carrier communications: SCADA
Modelling of Land Mobile Satellite Channel to Counter Channel Outage ijdpsjournal
A Land mobile satellite service (LMSS) is an arm of mobile satellite system (MSS), in which a number of
services are its subset. To ensure network availability, high quality of service (QoS), and reduce outage on
the channel as a result of channel interferences during propagation, it is important to understand channel
behaviour in various transmission environments. Vast literature has been published on the subject of
channel models that attempted to improve on impairments in communication links: a large number has
focused on narrowband channels than wideband. Due to advances in recent technology wideband
modelling of satellite channels becomes necessary, which this research study is focused, particularly
model for Land Mobile Satellite (LMS) channel. This study models the complete behaviour of LMS
Channel based on the Lutz’s (1989) two-state statistical model but modified with two-state Markov chain
for two different transmission environments, namely: shadowing (line-of-sight) and un- shadowing (nonline-of-sight)
conditions. In order to reduce the effect of channel outages, satellite diversity approach was
employed in addition to the 2-state Markov chain. Simulations of these conditions were performed using
MATLAB programming language. The study concludes that satellite diversity reduces outage on the
channel, and when mobile terminals have access to two geostationary satellites simultaneously network
availability is assured compared to when it has only one satellite link
MODELLING OF LAND MOBILE SATELLITE CHANNEL TO COUNTER CHANNEL OUTAGE ijdpsjournal
A Land mobile satellite service (LMSS) is an arm of mobile satellite system (MSS), in which a number of
services are its subset. To ensure network availability, high quality of service (QoS), and reduce outage on
the channel as a result of channel interferences during propagation, it is important to understand channel
behaviour in various transmission environments. Vast literature has been published on the subject of
channel models that attempted to improve on impairments in communication links: a large number has
focused on narrowband channels than wideband. Due to advances in recent technology wideband
modelling of satellite channels becomes necessary, which this research study is focused, particularly
model for Land Mobile Satellite (LMS) channel. This study models the complete behaviour of LMS
Channel based on the Lutz’s (1989) two-state statistical model but modified with two-state Markov chain
for two different transmission environments, namely: shadowing (line-of-sight) and un- shadowing (nonline-of-sight)
conditions. In order to reduce the effect of channel outages, satellite diversity approach was
employed in addition to the 2-state Markov chain. Simulations of these conditions were performed using
MATLAB programming language. The study concludes that satellite diversity reduces outage on the
channel, and when mobile terminals have access to two geostationary satellites simultaneously network
availability is assured compared to when it has only one satellite link.
MODELLING OF LAND MOBILE SATELLITE CHANNEL TO COUNTER CHANNEL OUTAGEijdpsjournal
A Land mobile satellite service (LMSS) is an arm of mobile satellite system (MSS), in which a number of services are its subset. To ensure network availability, high quality of service (QoS), and reduce outage on the channel as a result of channel interferences during propagation, it is important to understand channel behaviour in various transmission environments. Vast literature has been published on the subject of channel models that attempted to improve on impairments in communication links: a large number has focused on narrowband channels than wideband. Due to advances in recent technology wideband
modelling of satellite channels becomes necessary, which this research study is focused, particularly model for Land Mobile Satellite (LMS) channel. This study models the complete behaviour of LMS Channel based on the Lutz’s (1989) two-state statistical model but modified with two-state Markov chain
for two different transmission environments, namely: shadowing (line-of-sight) and un- shadowing (nonline-of-sight) conditions. In order to reduce the effect of channel outages, satellite diversity approach was employed in addition to the 2-state Markov chain. Simulations of these conditions were performed using MATLAB programming language. The study concludes that satellite diversity reduces outage on the channel, and when mobile terminals have access to two geostationary satellites simultaneously network availability is assured compared to when it has only one satellite link.
1. The document discusses the history and technical concepts of Iridium and Globalstar, two satellite constellation systems from the late 1990s that aimed to provide global mobile communications but ultimately failed economically.
2. Iridium and Globalstar used networks of low Earth orbit (LEO) satellites instead of geosynchronous satellites to overcome issues like signal delay and power requirements, but this required many more complex satellites.
3. Both systems launched in the late 1990s amid enthusiasm for new technologies and optimistic subscriber forecasts, but these forecasts proved overly optimistic and both filed for bankruptcy as their costs exceeded revenue.
Physical Layer Technologies And Challenges In Mobile Satellite CommunicationsIDES Editor
The central features of the future fourth-generation
mobile communication systems are the provisioning of highspeed
data transmissions (up to 1 Gb/s) and interactive
multimedia services. For effective delivery of these services,
the network must satisfy some stringent quality-of-service
(QoS) metrics, defined typically in terms of maximum delay
and/or minimum throughput performances. Mobile satellite
systems will be fully integrated with the future terrestrial
cellular systems, playing important roles as back-bones or
access satellites, to provide ubiquitous global coverage to
diverse users. The challenges for future broadband satellite
systems, therefore, lie in the proper deployments of state-ofthe-
art satellite technologies to ensure seamless integration of
the satellite networks into the cellular systems and its QoS
frameworks, while achieving, to the extent possible, efficient
use of the precious satellite link resources. This paper presents
an overview of the future high-speed satellite mobile
communication systems, the technologies deployed or planned
for deployments, and the challenges.
The document discusses the growing reliance on GPS for positioning, navigation and timing (PNT) services across many industries including aviation. It notes that while GPS is highly accurate, the satellite signals are weak and susceptible to interference. The FAA requires alternative PNT sources to back up GPS for critical aviation applications. The document makes the case for accelerating development of alternative PNT systems to support NextGen and ensure resiliency of PNT services for aviation given vulnerabilities of GPS to disruption.
This document provides instructions for setting up a school spy ring using activities from Tom Palmer's Spy Pack. It includes:
1) Instructions for choosing children to join the spy ring and finding a secret location to brief them.
2) Suggestions for introducing the spy ring concept and testing the children's suitability for the role.
3) A note that establishing rules and identities for the spy ring will help build group identity and secrecy.
The document summarizes the encryption methods used by the MfS (Stasi) of East Germany to communicate with spies via shortwave radio. It describes how agents were initially given mnemonic phrases to encrypt messages with a Soviet method until 1959, when the MfS switched to a secure one-time pad cipher using random numbers printed on paper strips. Messages were encrypted in headquarters and transmitted in 5-number groups to transmission stations. Agents decrypted with matching paper strips. Later, programmable speech-morse generators digitally announced numbers to agents in various languages. The document details the MfS's transmission stations, equipment, and methods used over time to covertly transmit encrypted radio messages to agents.
This document provides an overview of the SAT Competition 2014 (SC 2014). SC 2014 consisted of 13 competition tracks to evaluate SAT solvers on various types of benchmarks under different resource constraints. Around 50 solver descriptions and 10 benchmark descriptions were submitted by a total of around 80 contributors. This document compiles all the non-peer-reviewed solver and benchmark descriptions to provide insights into state-of-the-art SAT solving technology in 2014 and serve as a historical reference. Major support for running SC 2014 came from the community and computing resources from the University of Texas at Austin.
The document discusses mechanical dial locks versus electronic locks for safes. It recommends either a UL Group II mechanical dial lock or a commercial-grade electronic lock. While electronic locks are more convenient, mechanical dial locks are more durable and reliable long-term. The Sargent & Greenleaf model 6730 dial lock is an industry standard. Cheap imported electronic locks are prone to failures and can be difficult to repair if the lock fails with the door closed. The document advises choosing a UL certified commercial-grade electronic lock from reputable manufacturers if an electronic lock is preferred.
The document proposes a context-based access control mechanism for Android systems that allows users to set configuration policies controlling applications' access to device resources and services based on context such as location and time. It implements this access control framework on the Android operating system, allowing users to define physical places and link them to logical locations. The access controller then enforces the defined policies by granting or restricting privileges to applications dynamically based on the device's detected context. Experimental results show this mechanism can accurately detect contexts using Wi-Fi signals and effectively enforce access control policies with minimal performance impact.
The document describes interference measurements taken in an 802.11n wireless mesh network testbed. The testbed uses wireless routers with multiple 802.11n transceivers and directional antennas. Measurements were taken of co-channel interference, signal-to-interference-and-noise ratio (SINR), and TCP/UDP throughput over different channels. Even with very high SINR links of 30-40 dB using MIMO antennas and frame aggregation, the maximum TCP throughput achieved was only 47.85 Mbps, which is significantly lower than the maximum PHY transmission rate of 144 Mbps. The interference measurements from this testbed can help optimize the performance of large-scale 802.11n wireless
This document describes the design and implementation of a Bluetooth communication protocol between an Android mobile device and a microcontroller-powered robotic platform. The author selected the Android operating system and Samsung Galaxy Note II mobile device for development. A Propeller microcontroller, ActivityBot robotic kit, and RN-42 Bluetooth module were used for the robotic platform. The communication protocol and Android/Propeller software were developed to allow control of the robotic platform from the Android application over Bluetooth. Testing demonstrated responsive control of the robot via slider bars in the Android app.
This document provides instructions for using Televes SAT over IP products, including the SIP-4 and SIP-REC1. It describes:
1. The technical specifications of the SIP-4 and SIP-REC1 units.
2. How to connect the SIP-4 server to a satellite dish and network to stream satellite channels over IP.
3. How to access the SAT-IP stream using a web browser on a PC or apps on tablets to view live TV channels.
The document discusses security risks related to mobile devices used by lawyers and law firms. It notes that hundreds of laptops, storage devices, and handheld devices containing confidential information have been lost or stolen from government agencies in recent years. The document provides guidance on securing documents, passwords, encryption, metadata, and various mobile devices including laptops, USB drives, portable hard drives, phones and PDAs to protect confidential client information that may be stored or transferred using these devices. It emphasizes the importance of training staff, developing computer use policies, and balancing security needs with work demands.
This report summarizes research analyzing vulnerabilities when users connect to unsecured public Wi-Fi networks. The researchers collected data by creating their own rogue access points and monitoring existing public networks. They found over 2500 domains visited by 270 users, with many sites only using HTTPS for login leaving other traffic unencrypted. Successful attacks like traffic monitoring, HTTP request/response modification, and session hijacking were possible. A survey found most users aware of risks but not taking precautions. The researchers conclude that while encryption can help, users also need to be cautious on unsecured networks.
The SPY Elite System is a fluorescence imaging system that allows surgeons to capture and review real-time images of blood flow and tissue perfusion during surgery. It consists of an imaging device and single-use kits containing indocyanine green dye and sterile drapes. Operators must be trained to use the system safely and it requires adherence to warnings and safety procedures regarding the laser, ICG administration, and device operation.
This document discusses IpMorph, an open source software project that aims to defeat OS fingerprinting tools by spoofing the OS fingerprint of systems. It provides an overview of OS fingerprinting techniques, the state of spoofing tools at the time of writing, IpMorph's architecture and components, and how it can spoof fingerprints seen by tools like Nmap.
This document proposes two designs for a location-based authentication system for satellite TV to reduce piracy:
1) A lower-cost one-way system where an added decryption module receives an encrypted decryption key from the satellite signal.
2) A higher-cost two-way system requiring the module to also transmit and interact with a third party. Both aim to frequently change decryption keys embedded in signals in a transparent way to users, reducing disruptions compared to current smart card methods. The one-way system has limitations around key updating if messages are missed.
Home Depot confirmed that its payment systems in Canada and the US were breached, potentially affecting customers who used credit or debit cards between April-September 2014. Experts say the same malware may have been used in other recent retailer breaches like Target and Sally Beauty. Barclays is introducing finger-vein biometrics for internet banking authentication by 2015. A small number of Australians have microchipped themselves for convenience and to be on the cutting edge of technology.
This document is a spare parts catalogue for Micromed systems. It includes amplifiers, stimulators, interfaces, headbox cables, monitor cables, network components, supports, trolleys and other spare parts. The catalogue is divided into sections for current standard parts and obsolete parts. Current standard parts include items for the SD PLUS, SD LTM EXPRESS, MORPHEUS, MATRIX, MATRIX LIGHT, BRAIN SPY PLUS, ENERGY and PATTERN 10 systems. Obsolete sections cover older headboxes, stimulators, interfaces and accessories no longer in standard production. Micromed operates under ISO quality standards and parts are intended to be compatible replacements for Micromed EEG, EMG, PSG and
This document summarizes a research paper about strategies for gaining state support for global maritime security integration. It discusses two case studies: the Global Maritime Partnership and the Proliferation Security Initiative. The Global Maritime Partnership has been successful by promoting global maritime security without formal structures that could undermine state sovereignty. It leverages economic benefits of secure trade routes. The Proliferation Security Initiative also facilitates global integration by bypassing traditional state partnership mechanisms. Both examples concentrate on cooperative techniques that extend beyond just states to gain broader support for anti-piracy networks.
This article discusses how future wars may be fought based on the strategic cultures of different actors. It uses a "2x2 matrix" methodology to categorize actors into four strategic cultures - the Bully, the Underdog, the Shape-Shifter, and the Survivor - based on their size and tendency towards warrior ideology or pragmatism. It provides examples of current actors that exhibit characteristics of each strategic culture, and argues that understanding these strategic cultures can provide insight into how future wars may be approached and fought by different actors through 2025.