This document describes an optical satellite tracking system developed for undergraduate research using commercial off-the-shelf components. The system includes a camera, lens, tracking mount, laptop computer, and software. It has been used to successfully image unresolved satellites as dim as 6th magnitude. Future plans include establishing a permanent assembly with networked control and automated data collection.
1. The document proposes a system using drones to detect garbage and alert cleaners. A detector drone will fly over an area, take photos, and send them to a server. The server uses computer vision to identify garbage and alerts the nearest cleaner.
2. A checker drone then verifies that the garbage has been cleaned. It flies to locations where garbage was detected and uses computer vision to confirm if cleaning was completed. This system aims to help keep areas clean as part of India's Swachh Bharat mission.
3. The detector drone takes photos with a camera and GPS and sends them to a server. The server uses a convolutional neural network model trained on garbage images to identify garbage in the photos. If
Advantages and disadvantages of Remote SensingEr Abhi Vashi
This document discusses the advantages and disadvantages of remote sensing. Some key advantages include large area coverage allowing regional surveys, repetitive coverage enabling monitoring of dynamic themes, and data being acquired at different scales and resolutions. Disadvantages include remote sensing being expensive for small areas, requiring specialized training, and human errors potentially being introduced. The document provides 15 advantages and 9 disadvantages of remote sensing in detail.
This document provides an overview of wind profiler radar systems produced by NRIET, including:
- NRIET has deployed 49 wind profiler radar systems in China, with the majority being boundary layer systems. Several systems have also been deployed internationally.
- NRIET's systems include boundary layer, tropospheric, and stratospheric profiling radars. Their boundary layer system, the CLC-11, uses active phased array technology and pulse compression for high accuracy wind measurements.
- NRIET is developing an integrated airport weather warning system software suite to ingest and analyze data from multiple sensors like wind profilers and provide alerts and visualizations to airport operators.
Design of Kalman filter for Airborne ApplicationsIJERA Editor
Today multiple multi-sensor airborne surveillance systems are available which comprises of primary radar and
secondary surveillance radar as the active sensor on board. The electronics and communication support measure
system (ECSMS) will aid in identification, detection and classification of targets. These systems will detect,
identify, classify the different threats present in the surveillance area and supports defense operation. These
systems contain multiple functional operations as detection of air borne and surface target, tracking, and Multisensor
data fusion. This paper presents the multi-sensor data fusion technique and how to detect and track
moving target in the surveillance area.
The document summarizes a study that compares the performance of camera-only, IMU-only, and combined camera-IMU systems for visual inertial navigation (VisNav) and simultaneous localization and mapping (SLAM). Data was collected from a camera and IMU mounted on a rolling platform traversing a test course. The camera performed poorly around corners while the IMU had offset errors, but combining the sensors was superior to either individually. Statistical analysis showed the mean error was significantly lower for the camera-IMU system compared to the camera-only and IMU-only systems. The study was limited but integrating the sensors helped compensate their individual weaknesses.
IRJET- Get2School : An Android Application to Track School LocationIRJET Journal
This document presents the design of a mobile application called Get2School that allows users to search for schools within a given location and radius. It uses GPS and mapping APIs to determine a user's current location and display nearby schools on a map. The application also provides details about each school like contact information. It uses algorithms like localization and Kalman filtering to improve GPS accuracy. The objectives are to allow users to efficiently search and find details of schools in their locality. Such an application could help people relocate schools easily. It has potential for expansion to include searching for other locations like colleges, hospitals etc.
1. The document proposes a system using drones to detect garbage and alert cleaners. A detector drone will fly over an area, take photos, and send them to a server. The server uses computer vision to identify garbage and alerts the nearest cleaner.
2. A checker drone then verifies that the garbage has been cleaned. It flies to locations where garbage was detected and uses computer vision to confirm if cleaning was completed. This system aims to help keep areas clean as part of India's Swachh Bharat mission.
3. The detector drone takes photos with a camera and GPS and sends them to a server. The server uses a convolutional neural network model trained on garbage images to identify garbage in the photos. If
Advantages and disadvantages of Remote SensingEr Abhi Vashi
This document discusses the advantages and disadvantages of remote sensing. Some key advantages include large area coverage allowing regional surveys, repetitive coverage enabling monitoring of dynamic themes, and data being acquired at different scales and resolutions. Disadvantages include remote sensing being expensive for small areas, requiring specialized training, and human errors potentially being introduced. The document provides 15 advantages and 9 disadvantages of remote sensing in detail.
This document provides an overview of wind profiler radar systems produced by NRIET, including:
- NRIET has deployed 49 wind profiler radar systems in China, with the majority being boundary layer systems. Several systems have also been deployed internationally.
- NRIET's systems include boundary layer, tropospheric, and stratospheric profiling radars. Their boundary layer system, the CLC-11, uses active phased array technology and pulse compression for high accuracy wind measurements.
- NRIET is developing an integrated airport weather warning system software suite to ingest and analyze data from multiple sensors like wind profilers and provide alerts and visualizations to airport operators.
Design of Kalman filter for Airborne ApplicationsIJERA Editor
Today multiple multi-sensor airborne surveillance systems are available which comprises of primary radar and
secondary surveillance radar as the active sensor on board. The electronics and communication support measure
system (ECSMS) will aid in identification, detection and classification of targets. These systems will detect,
identify, classify the different threats present in the surveillance area and supports defense operation. These
systems contain multiple functional operations as detection of air borne and surface target, tracking, and Multisensor
data fusion. This paper presents the multi-sensor data fusion technique and how to detect and track
moving target in the surveillance area.
The document summarizes a study that compares the performance of camera-only, IMU-only, and combined camera-IMU systems for visual inertial navigation (VisNav) and simultaneous localization and mapping (SLAM). Data was collected from a camera and IMU mounted on a rolling platform traversing a test course. The camera performed poorly around corners while the IMU had offset errors, but combining the sensors was superior to either individually. Statistical analysis showed the mean error was significantly lower for the camera-IMU system compared to the camera-only and IMU-only systems. The study was limited but integrating the sensors helped compensate their individual weaknesses.
IRJET- Get2School : An Android Application to Track School LocationIRJET Journal
This document presents the design of a mobile application called Get2School that allows users to search for schools within a given location and radius. It uses GPS and mapping APIs to determine a user's current location and display nearby schools on a map. The application also provides details about each school like contact information. It uses algorithms like localization and Kalman filtering to improve GPS accuracy. The objectives are to allow users to efficiently search and find details of schools in their locality. Such an application could help people relocate schools easily. It has potential for expansion to include searching for other locations like colleges, hospitals etc.
This technical report describes the design and development of a waypoint-based rover prototype for coastal surveillance. The objectives are to develop a waypoint system suitable for coastal monitoring using a rover that can move across various surfaces and validate its operational capabilities. The prototype rover is equipped with a GPS, magnetometer, and wireless communication to set waypoints and receive instructions via an Arduino microcontroller. It is intended to improve existing coastal monitoring tools by allowing autonomous operation along preset routes.
Indoor localisation and dead reckoning using Sensor Tag™ BLE.Abhishek Madav
The mobile application uses readings of the Accelerometer and Gyroscope from the Sensor Tag to describe details of motion in a planar mode. The project has been implemented as a part of the EECS 221 coursework at University of California, Irvine.
The Incorporation of Machine Learning into Scientific Simulations at Lawrence...inside-BigData.com
In this deck from the Stanford HPC Conference, Katie Lewis from Lawrence Livermore National Laboratory presents: The Incorporation of Machine Learning into Scientific Simulations at Lawrence Livermore National Laboratory.
"Scientific simulations have driven computing at Lawrence Livermore National Laboratory (LLNL) for decades. During that time, we have seen significant changes in hardware, tools, and algorithms. Today, data science, including machine learning, is one of the fastest growing areas of computing, and LLNL is investing in hardware, applications, and algorithms in this space. While the use of simulations to focus and understand experiments is well accepted in our community, machine learning brings new challenges that need to be addressed. I will explore applications for machine learning in scientific simulations that are showing promising results and further investigation that is needed to better understand its usefulness."
Watch the video: https://youtu.be/NVwmvCWpZ6Y
Learn more: https://computing.llnl.gov/research-area/machine-learning
and
http://www.hpcadvisorycouncil.com/events/2020/stanford-workshop/
Sign up for our insideHPC Newsletter: http://insidehpc.com/newsletter
This document discusses multisensor data fusion for defense applications. It describes data fusion as integrating data from multiple sensors to provide a more complete picture than from individual sensors alone. Some key defense applications discussed include surveillance, intelligence analysis, and missile guidance systems. The document also provides an example of using a Kalman filter for multisensor data fusion to estimate the state of a moving target tracked by multiple sensors.
This document discusses modern equipment used in survey work, including EDM, total stations, auto levels, digital levels, remote sensing systems, and GPS. It provides details on how each tool works and its uses and benefits. EDM uses electromagnetic signals to measure distances, total stations integrate distance and angle measurement with data recording, auto levels automate leveling tasks, and digital levels use digital imaging to read staffs. Remote sensing involves analyzing data from sensors to learn about areas without contact, and GPS utilizes signals from satellites to determine location globally.
LIDAR uses laser pulses to measure distance and can be used to create digital elevation models (DEMs) and terrain models. LIDAR systems consist of a laser scanner, direct georeferencing system (GPS and INS), and computer processing. LIDAR data provides highly accurate elevation data that has many applications including flood inundation mapping, as demonstrated after Hurricane Katrina where LIDAR data helped assess flooding in New Orleans. LIDAR has revolutionized data collection and applications in mapping, engineering, and design through 3D modeling of terrain and structures.
Comparison Of Elevation Collection TechnologiesPaulDavidShaw
The document compares different technologies for collecting data for flood modelling: GPS, aerial photography, LIDAR, SAR (Synthetic Aperture Radar), and multispectral satellite imagery. It discusses the process, potential sources of error, benefits, concerns, and general comments for each technology. Height data is increasingly important for flood modelling, and the best technology depends on required accuracy, monitoring frequency, information needs, budget, and timeline. Other modelling considerations include effects of climate change and land movement.
The Time and Frequency Laboratory of the Hellenic Institute of Metrology (EIM)eimgreece
1. Continuous and reliable local representation of Universal Coordinated Time - UTC(EIM).
2. Contribution to Temps Atomique International (TAI).
3. Reliable and continuous distribution of reference frequencies.
4. Traceability to the international standards.
5. Broadcast of standard time and frequency signals inside and outside EIM facilities.
A Study of Motion Detection Method for Smart Home SystemAM Publications
Motion detection surveillance technology give ease for time-consuming reviewing process that a normal video
surveillance system offers. By using motion detection, it save the monitoring time and cost. It has gained a lot of interests
over the past few years. In this paper, a proposed motion detection surveillance system, through the study and evaluation
of currently available different methods. The proposed system is efficient and convenient for both office and home uses as
a smart home security system technology.
This document provides an overview of Satrack, which receives, rebroadcasts, records, and tracks satellite signals. It is used as a guidance system and to collect data for error modeling. Satrack integrates with weapon systems and provides post-flight processing. It allows for more accurate weapon testing by providing telemetry and tracking hardware. Satrack works using GPS, sensors, and motion detectors. It has applications in aircraft flight paths, vehicle tracking, and satellite communication systems. The future aims to improve batch processing, full digital implementation, and evaluation capabilities.
This document discusses laser ranging and LIDAR systems. It provides an overview of satellite laser ranging (SLR) which uses lasers to precisely measure distances to satellites. It then describes the key components and workings of LIDAR systems, including lasers, scanners, inertial measurement units, GPS, and how they are used to map terrain from aircraft. Sources of error in LIDAR measurements are also reviewed. The document concludes by outlining applications of LIDAR in fields such as surveying, mining, forestry, and transport.
Surveying techniques have a long history dating back to ancient Egypt in 3000 BC. Precise surveying was important for projects like the Great Pyramids of Giza. In later centuries, surveying was critical for territorial expansion in countries like India and America. Modern surveying methods increasingly utilize electronic devices like total stations, GPS, mobile mapping, and airborne laser scanning to gather precise geographic data.
Passive remote sensing is a class of Remote Sensing that make use of Passive Remote Sensors. The sensors are used to detect natural radiations that are emitted by the object or by its surrounding areas. The most common source of energy that is measured by Passive Remote Sensors is “Reflected Sunlight”.
The document discusses the science and techniques of photogrammetry. Photogrammetry involves deriving precise 3D coordinates of points by viewing an area from two angles and mathematically intersecting converging lines in space. It allows for the creation of accurate 3D models, textured models, and dense surface models from photographs for applications like measurements, visualization, and meshing. The process involves camera calibration, data acquisition through stereo or all-directional photography, feature marking, orientation, idealization, point cloud generation, meshing, surface generation, texturing, and exporting the 3D data.
IRJET - Millisecond Rotation Pulsars as Next Generation Grid Timing SourcesIRJET Journal
This document discusses using millisecond rotation pulsars as timing sources for synchronized measurements on the electric power grid. It begins by explaining how precise time synchronization is important for measurements like phasor measurement units. It then discusses millisecond rotation pulsars as potential replacements or backups for GPS due to their high rotation precision. The document considers practical issues around receiving pulsar signals and integrating the timing information into existing grid timing distribution networks. It concludes by outlining how pulsar timing signals could be distributed to grid applications through existing protocols.
SATRACK is a missile guidance system evaluation methodology that uses GPS signals to track satellites and evaluate error and accuracy for ballistic missile guidance systems. The major modules of SATRACK are the GPS translator, telemetry ground station, and post flight processing. It provides precise error measurements and accuracy assessments that were previously difficult to obtain. SATRACK continues to support strategic weapons system operations and evolution.
The document summarizes the contributions of an MEng student project to the development of the KORUZA free-space optical communication system. The student developed (1) an error-correcting code to remove random and burst errors from sensor data, (2) analyzed data from KORUZA units to find correlations between received power and temperature, and (3) created a fog detection system using webcam images to estimate visibility and detect fog conditions. The student's work improved KORUZA's data quality, provided insights into system optimizations, and added an automated fog detection capability.
Human Motion Detection in Video Surveillance using Computer Vision TechniqueIRJET Journal
The document discusses a technique for detecting human motion in video surveillance using computer vision. It proposes a method called DECOLOR (Detecting Contiguous Outliers in the LOw-rank Representation) that formulates object detection as outlier detection in a low-rank representation of video frames. This allows it to detect moving objects flexibly without assumptions about foreground or background behavior. DECOLOR simultaneously performs object detection and background estimation using only the test video sequence, without requiring training data. The method models the outlier support explicitly and favors spatially contiguous outliers, making it suitable for detecting clustered foreground objects like people. It achieves more accurate detection and background estimation than state-of-the-art robust principal component analysis methods.
The document depicts the process of DNA replication. DNA helicase unzips the two strands of DNA by breaking the hydrogen bonds between complementary bases. DNA polymerase then reads and replicates each strand by adding complementary nucleotides, using one strand as a template to synthesize the new strand. This results in two identical copies of the original DNA.
Building Linux IPv6 DNS Server (Complete Soft Copy)Hari
The document discusses building a Linux IPv6 DNS server. It provides an overview of the project which aims to configure a DNS server in Linux with IPv6 name resolution. It discusses the hardware and software requirements including using Red Hat Linux, kernel version 2.4 or higher, and BIND version 9. It also summarizes the key steps in building the DNS server such as creating a new kernel, making the DNS server support IPv6, and providing a backup of the existing kernel.
This technical report describes the design and development of a waypoint-based rover prototype for coastal surveillance. The objectives are to develop a waypoint system suitable for coastal monitoring using a rover that can move across various surfaces and validate its operational capabilities. The prototype rover is equipped with a GPS, magnetometer, and wireless communication to set waypoints and receive instructions via an Arduino microcontroller. It is intended to improve existing coastal monitoring tools by allowing autonomous operation along preset routes.
Indoor localisation and dead reckoning using Sensor Tag™ BLE.Abhishek Madav
The mobile application uses readings of the Accelerometer and Gyroscope from the Sensor Tag to describe details of motion in a planar mode. The project has been implemented as a part of the EECS 221 coursework at University of California, Irvine.
The Incorporation of Machine Learning into Scientific Simulations at Lawrence...inside-BigData.com
In this deck from the Stanford HPC Conference, Katie Lewis from Lawrence Livermore National Laboratory presents: The Incorporation of Machine Learning into Scientific Simulations at Lawrence Livermore National Laboratory.
"Scientific simulations have driven computing at Lawrence Livermore National Laboratory (LLNL) for decades. During that time, we have seen significant changes in hardware, tools, and algorithms. Today, data science, including machine learning, is one of the fastest growing areas of computing, and LLNL is investing in hardware, applications, and algorithms in this space. While the use of simulations to focus and understand experiments is well accepted in our community, machine learning brings new challenges that need to be addressed. I will explore applications for machine learning in scientific simulations that are showing promising results and further investigation that is needed to better understand its usefulness."
Watch the video: https://youtu.be/NVwmvCWpZ6Y
Learn more: https://computing.llnl.gov/research-area/machine-learning
and
http://www.hpcadvisorycouncil.com/events/2020/stanford-workshop/
Sign up for our insideHPC Newsletter: http://insidehpc.com/newsletter
This document discusses multisensor data fusion for defense applications. It describes data fusion as integrating data from multiple sensors to provide a more complete picture than from individual sensors alone. Some key defense applications discussed include surveillance, intelligence analysis, and missile guidance systems. The document also provides an example of using a Kalman filter for multisensor data fusion to estimate the state of a moving target tracked by multiple sensors.
This document discusses modern equipment used in survey work, including EDM, total stations, auto levels, digital levels, remote sensing systems, and GPS. It provides details on how each tool works and its uses and benefits. EDM uses electromagnetic signals to measure distances, total stations integrate distance and angle measurement with data recording, auto levels automate leveling tasks, and digital levels use digital imaging to read staffs. Remote sensing involves analyzing data from sensors to learn about areas without contact, and GPS utilizes signals from satellites to determine location globally.
LIDAR uses laser pulses to measure distance and can be used to create digital elevation models (DEMs) and terrain models. LIDAR systems consist of a laser scanner, direct georeferencing system (GPS and INS), and computer processing. LIDAR data provides highly accurate elevation data that has many applications including flood inundation mapping, as demonstrated after Hurricane Katrina where LIDAR data helped assess flooding in New Orleans. LIDAR has revolutionized data collection and applications in mapping, engineering, and design through 3D modeling of terrain and structures.
Comparison Of Elevation Collection TechnologiesPaulDavidShaw
The document compares different technologies for collecting data for flood modelling: GPS, aerial photography, LIDAR, SAR (Synthetic Aperture Radar), and multispectral satellite imagery. It discusses the process, potential sources of error, benefits, concerns, and general comments for each technology. Height data is increasingly important for flood modelling, and the best technology depends on required accuracy, monitoring frequency, information needs, budget, and timeline. Other modelling considerations include effects of climate change and land movement.
The Time and Frequency Laboratory of the Hellenic Institute of Metrology (EIM)eimgreece
1. Continuous and reliable local representation of Universal Coordinated Time - UTC(EIM).
2. Contribution to Temps Atomique International (TAI).
3. Reliable and continuous distribution of reference frequencies.
4. Traceability to the international standards.
5. Broadcast of standard time and frequency signals inside and outside EIM facilities.
A Study of Motion Detection Method for Smart Home SystemAM Publications
Motion detection surveillance technology give ease for time-consuming reviewing process that a normal video
surveillance system offers. By using motion detection, it save the monitoring time and cost. It has gained a lot of interests
over the past few years. In this paper, a proposed motion detection surveillance system, through the study and evaluation
of currently available different methods. The proposed system is efficient and convenient for both office and home uses as
a smart home security system technology.
This document provides an overview of Satrack, which receives, rebroadcasts, records, and tracks satellite signals. It is used as a guidance system and to collect data for error modeling. Satrack integrates with weapon systems and provides post-flight processing. It allows for more accurate weapon testing by providing telemetry and tracking hardware. Satrack works using GPS, sensors, and motion detectors. It has applications in aircraft flight paths, vehicle tracking, and satellite communication systems. The future aims to improve batch processing, full digital implementation, and evaluation capabilities.
This document discusses laser ranging and LIDAR systems. It provides an overview of satellite laser ranging (SLR) which uses lasers to precisely measure distances to satellites. It then describes the key components and workings of LIDAR systems, including lasers, scanners, inertial measurement units, GPS, and how they are used to map terrain from aircraft. Sources of error in LIDAR measurements are also reviewed. The document concludes by outlining applications of LIDAR in fields such as surveying, mining, forestry, and transport.
Surveying techniques have a long history dating back to ancient Egypt in 3000 BC. Precise surveying was important for projects like the Great Pyramids of Giza. In later centuries, surveying was critical for territorial expansion in countries like India and America. Modern surveying methods increasingly utilize electronic devices like total stations, GPS, mobile mapping, and airborne laser scanning to gather precise geographic data.
Passive remote sensing is a class of Remote Sensing that make use of Passive Remote Sensors. The sensors are used to detect natural radiations that are emitted by the object or by its surrounding areas. The most common source of energy that is measured by Passive Remote Sensors is “Reflected Sunlight”.
The document discusses the science and techniques of photogrammetry. Photogrammetry involves deriving precise 3D coordinates of points by viewing an area from two angles and mathematically intersecting converging lines in space. It allows for the creation of accurate 3D models, textured models, and dense surface models from photographs for applications like measurements, visualization, and meshing. The process involves camera calibration, data acquisition through stereo or all-directional photography, feature marking, orientation, idealization, point cloud generation, meshing, surface generation, texturing, and exporting the 3D data.
IRJET - Millisecond Rotation Pulsars as Next Generation Grid Timing SourcesIRJET Journal
This document discusses using millisecond rotation pulsars as timing sources for synchronized measurements on the electric power grid. It begins by explaining how precise time synchronization is important for measurements like phasor measurement units. It then discusses millisecond rotation pulsars as potential replacements or backups for GPS due to their high rotation precision. The document considers practical issues around receiving pulsar signals and integrating the timing information into existing grid timing distribution networks. It concludes by outlining how pulsar timing signals could be distributed to grid applications through existing protocols.
SATRACK is a missile guidance system evaluation methodology that uses GPS signals to track satellites and evaluate error and accuracy for ballistic missile guidance systems. The major modules of SATRACK are the GPS translator, telemetry ground station, and post flight processing. It provides precise error measurements and accuracy assessments that were previously difficult to obtain. SATRACK continues to support strategic weapons system operations and evolution.
The document summarizes the contributions of an MEng student project to the development of the KORUZA free-space optical communication system. The student developed (1) an error-correcting code to remove random and burst errors from sensor data, (2) analyzed data from KORUZA units to find correlations between received power and temperature, and (3) created a fog detection system using webcam images to estimate visibility and detect fog conditions. The student's work improved KORUZA's data quality, provided insights into system optimizations, and added an automated fog detection capability.
Human Motion Detection in Video Surveillance using Computer Vision TechniqueIRJET Journal
The document discusses a technique for detecting human motion in video surveillance using computer vision. It proposes a method called DECOLOR (Detecting Contiguous Outliers in the LOw-rank Representation) that formulates object detection as outlier detection in a low-rank representation of video frames. This allows it to detect moving objects flexibly without assumptions about foreground or background behavior. DECOLOR simultaneously performs object detection and background estimation using only the test video sequence, without requiring training data. The method models the outlier support explicitly and favors spatially contiguous outliers, making it suitable for detecting clustered foreground objects like people. It achieves more accurate detection and background estimation than state-of-the-art robust principal component analysis methods.
The document depicts the process of DNA replication. DNA helicase unzips the two strands of DNA by breaking the hydrogen bonds between complementary bases. DNA polymerase then reads and replicates each strand by adding complementary nucleotides, using one strand as a template to synthesize the new strand. This results in two identical copies of the original DNA.
Building Linux IPv6 DNS Server (Complete Soft Copy)Hari
The document discusses building a Linux IPv6 DNS server. It provides an overview of the project which aims to configure a DNS server in Linux with IPv6 name resolution. It discusses the hardware and software requirements including using Red Hat Linux, kernel version 2.4 or higher, and BIND version 9. It also summarizes the key steps in building the DNS server such as creating a new kernel, making the DNS server support IPv6, and providing a backup of the existing kernel.
The document describes the process of transcription and translation in a cell. It shows how DNA is transcribed into mRNA by RNA polymerase in the nucleus. The mRNA is then exported through the nuclear pore into the cytoplasm. In the cytoplasm, ribosomes translate the mRNA into a protein by linking amino acids specified by the mRNA codons.
Guidi Sherer Everything You Wanted to Know About 340B Oncology Issues 2011Matt Sherer
The document provides information about the 340B Drug Pricing Program. It describes the program as originating from legislation in 1992 that limits drug costs for certain healthcare facilities. Safety-net providers can save 20-50% on drug costs by participating. To qualify, a disproportionate share hospital must meet requirements like having an 11.75% DSH percentage and maintaining separate drug inventories for 340B and non-340B patients. The Affordable Care Act expanded eligibility for the program and increased compliance monitoring.
Tulevaisuus on mobiilissa! Miten muuttuu intranetien konsepti?Hanna P. Korhonen
Tulevaisuus on mobiilissa! Miten muuttuu intranetien konsepti?
Esitykseni Intranet & digitaalinen työympäristö SUMMIT 2015 -seminaarissa 29.9.2015.
Sisältää neljä vinkkiä intranetin mobiilistrategian muodostamisen pohjaksi.
Introduction to Android G Sensor I²C Driver on AndroidBo-Yi Wu
This document provides an introduction and overview of G sensor I2C drivers on Android. It discusses what a G sensor is and its applications. It then covers the key aspects of implementing an I2C driver for a G sensor from initializing the driver and registering it, to detecting and probing devices, and creating I2C clients. Issues that may occur and how to resolve them are also addressed.
Intranet palvelut Suomessa 2016 -selvitys. Tähän esitykseen on koottu kaikkien kyselyn kysymysten tulokset. Lue lisää blogistamme: https://intranet-ostajanopas.fi/category/intranet-palvelut-suomessa-2016/ . Tässä esityksessä on kuvia, jotka ovat kaapattu tulosjulisteesta, mikä on saatavana myös pdf-muodossa (eli tarkempilaatuisena): https://viidestaso.files.wordpress.com/2016/09/intranet-palvelut-suomessa-2016-selvitys-juliste.pdf
Intranet palvelut Suomessa 2016 - Esitys 28.9.2016 Digitaalinen työympäristö ...Hanna P. Korhonen
Intranet-palvelut Suomessa 2016 -selvityksen tulokset
Esitys Digitaalinen työympäristö & intranet 2016 -seminaarissa 28.9.2016, Talentum Events, Helsinki
La pandemia de COVID-19 ha tenido un impacto significativo en la economía mundial. Muchos países experimentaron fuertes caídas en el PIB y aumentos en el desempleo debido a los cierres generalizados y las restricciones a los viajes. Aunque las vacunas ofrecen esperanza de una recuperación económica en 2021, el panorama a corto plazo sigue siendo incierto dado el resurgimiento de casos en algunas partes del mundo.
Este documento describe la importancia del reciclaje para el medio ambiente y la necesidad de que las personas aprendan a reciclar correctamente. Explica qué es el reciclaje, cómo funciona el proceso de reciclaje, los diferentes tipos de contenedores para separar los materiales, la regla de las tres "R", y por qué es importante reciclar para reducir la contaminación y proteger los recursos naturales. El autor concluye enfatizando que el reciclaje ayuda a preservar el planeta y la capa de ozono para las generaciones futuras
This document discusses 10 common ColdFusion server challenges and how to find and solve them. It covers issues like not having insight into site traffic, not using diagnostics to understand crashes or memory issues, not updating connectors and the Java virtual machine. For each issue, it provides potential solutions like monitoring tools, server logs, and updating to fixes. It emphasizes taking a diagnostic approach and notes that hiring an expert can help solve problems more quickly when needed.
Dave Ferguson gave a presentation on creating mobile applications using ColdFusion 11. He began by introducing himself and his background. The presentation covered the mobile features of ColdFusion 11, how to create real mobile apps, and the role of ColdFusion Builder. Ferguson demonstrated how to build mobile apps that can be installed on devices or run in browsers from the same ColdFusion source code. He also showed examples of mobile apps created with ColdFusion and discussed debugging mobile apps remotely with Weinre. Ferguson concluded by explaining how ColdFusion Builder can be used to package and deploy mobile applications.
We'll cover how to design a responsive website responsibly - How you can delivery a consistent user experience to users on small and large screen devices and how to decrease your website's page size quickly and effectively to make your website load fast even on slow internet connections. We'll cover how to use the newest HTML5 specifications even on browsers that do not have native support such as the <picture> element. We'll discuss how HTTP/2 changes things and also the new service worker specification and what that means.
This document provides an overview of plugins for ColdFusion Builder. It discusses plugins for source control (SVN, GIT), databases (Toad, DBeaver), debugging (Builder Debugger, Fusion DebUG), project management (Mylyn), and collaboration (SAROS, Code Reviewer). Links are provided to download the plugins from an update site and join a Slack channel for further assistance. The document aims to help users get the most out of ColdFusion Builder through the use of useful plugins.
This document summarizes a presentation about optimizing database performance in ColdFusion applications. It discusses how to analyze query plans to understand how queries are executing and identify optimization opportunities. Specific tips covered include using query parameters to promote plan reuse, optimizing indexes, combining queries to reduce round trips to the database, and monitoring server resources and database statistics that can impact performance. The presentation also provides examples of inefficient SQL patterns to avoid, such as inline queries and over-joining of data.
International Journal of Engineering and Science Invention (IJESI)inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
This document discusses research integrating atmospheric sensors onto unmanned aerial vehicles (UAVs) at the University of Wisconsin-Eau Claire. The goal is to monitor temperature, humidity, wind, and ozone in real-time using sensors on the UAV. Challenges include power, weight restrictions, data acquisition, and storage. Researchers are working to implement a microcontroller for onboard data collection and storage, and to output data in real-time through the autopilot for adjusted flight based on conditions. Integration of sensors and real-time data transmission pose engineering hurdles to overcome.
IRJET- Design the Surveillance Algorithm and Motion Detection of Objects for ...IRJET Journal
This document describes a methodology for using computer vision and image processing algorithms to enable surveillance and motion detection capabilities for unmanned aerial vehicles (UAVs). Specifically, it involves using a UAV equipped with cameras to collect imagery of a predefined area. The imagery is transmitted to a ground station where it is processed using OpenCV and Python. Motion detection is performed by subtracting subsequent frames to identify pixel differences and applying a threshold to isolate moving objects from the background. The results show this approach can successfully separate foreground objects from the background and detect vehicle motion in test video footage. The methodology provides a potential solution for more efficient UAV-based surveillance with reduced human involvement and risk.
This document describes the design of an extensible telemetry and command architecture for small satellites. Key aspects include:
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An optical satellite tracking system for undergraduate research bruski, jones, dahlke
1. American Institute of Aeronautics and Astronautics
1
An Optical Satellite Tracking System for
Undergraduate Research
Shane M. Bruski1
United States Air Force Academy, USAF Academy, CO, 80841
Michael P. Jones2
United States Air Force Academy, USAF Academy, CO, 80841
Dr. Scott R. Dahlke3
United States Air Force Academy, USAF Academy, CO, 80841
A commercial off-the-shelf satellite tracking system is developed and utilized for
determining satellite characteristics on a minimum budget. A summary of the system
components, developments, capabilities, and future improvements is addressed within this
paper. The system is divided into four main components: camera and lens, tracking mount,
tracking and data handling computer, and software. The system is highly mobile and has
provided usable research data through the imaging of unresolved satellites as dim as 6th
magnitude. Future plans for a permanent assembly with networked control and automated
data collection is also described.
Nomenclature
Exposure - camera shutter time (seconds)
Magnitude - logarithmic measure of the brightness of an object
I. Introduction
PACE Situational Awareness has become an increasingly important topic as we continue to populate space and
rely on space assets. Traditionally large telescopes and expensive operation costs have been required to
effectively track satellites. In the past couple of decades several systems have been developed to help reduce the
associated costs. 1,2
This project is an attempt to reduce the costs even more.
The following paper describes the system, the developments and improvements that have been made since the
start of the project last year. First a summary of operations explains process of using the system, including pre-
observations setup, recording data, and post processing the recorded data. The system components section provides
a summary of all equipment utilized to run the system, and the details of each component within the system. A
developments and capabilities section describes the limits of the system along with any problems that were
encountered and the solutions to those problems. Finally a short explanation of the results of the system so far is
listed to provide insight to the system’s success.
II. Summary of Operation
The main components of the overall process include: pre-pass planning, equipment setup and calibration, data
collection, and post observation data processing. The pre-pass planning phase consists of three elements. First, a
weather prediction of sky coverage is used to make sure the observing time will have minimal cloud cover. The
main source for this information is from the National Weather Service’s Hourly Weather Forecast Graph for the
local area, which can be found online. Second, pass predictions for the most visible satellites needs to be obtained.
This information is generally obtained from Heavens-above.com, which provides information on visible passes from
the observation site and magnitude predictions for the brightness of each satellite. From this information, satellite
1
C2C, USAFA/DFAS, P.O. Box 4823 USAF Academy CO 80841, AIAA Member 413571
2
C2C, USAFA/DFAS, P.O. Box 4351 USAF Academy CO 80841, AIAA Member 454186
3
Professor, USAFA/DFAS, 2354 Fairchild Dr, USAF Academy, CO 80840, AIAA Member 74625
S
2. American Institute of Aeronautics and Astronautics
2
passes are chosen based on the quality of data that they will provide. Considerations include, the duration and
orientation of the pass (a higher elevation pass visible from horizon to horizon is best), magnitude, pass time
windows, previously recorded satellites, and dimensional data (if publicly available). The final pre-pass plan step is
to obtain current two line element (TLE) orbit information for the satellites to be observed. The main source of TLE
data is Space-Track.org. If this website does not contain the TLE data needed, the data is obtained from the
Heavens-above.com. The setup phase consists of placing the tracking mount in position, applying power, mounting
the camera and lens on the tracking mount, and connecting the camera and hand controller to the tracking computer
via USB extension cables. The mount is then manually controlled to point at Polaris and the lens focus is adjusted as
needed. The tracking mount is then aligned on Polaris. This calibrates the mount’s sky pointing position, and is
fairly accurate as long as the mount is on a level surface. Next a test satellite pass is used to test the alignment and
adjust the lead/lag time of the tracking software driving the mount. Ideally the satellite should show up in the center
of the frame, if not, the lead/lag time is adjusted to correct for time errors in the TLE or the computer clock. If this
does not fix the problem, realignment is needed. Next, the planned satellite passes are recorded. Finally the resulting
data is post processed into image sequences to contain positional pointing data used for analysis of the dimensional
characteristics of each satellite.
III.System Components
A. System Equipment
The system includes all readily available commercial equipment found in Table 1 below. All equipment pricing
is quoted from currently available online sources. This table shows that anyone with a need for optical tracking can
replicate this system with only a relatively small initial investment.
Table 1: System Equipment Listing with Prices
Part Product/Description Price
Camera The Imaging Source DMK 41AU02.AS (Monochrome,
1280x960)
$630
Lens Nikon 35mm f/1.8G AF-S DX $200
Tracking Mount Celestron Nexstar 6SE Mount $700 (w/ telescope)
USB Cables 2 X 20m USB 2.0 cable $30 (each)
Mount AC Power Adaptor Celestron AC Adaptor $20
Computer-to-Mount drive
cable
Celestron Nexstar RS232 PC Interface Cable $16
Serial-to-USB Converter Generic USB-to-Serial Adaptor w/cable $20 (avg)
Power Extension Cable Generic Extension AC Power Cable $25 (avg)
Laptop Toshiba Qosmio 17inch Notebook $1400
Camera Hard Case Generic Medium Hard Case (non-waterproof) $35 (avg)
Lens UV Protective Filter Nikon 52mm Filter $24
Dovetail Mount ADM Accessories Vixen Series to D Series Adapter $109
C-Mount C-mount adaptor for Nikon Camera Lens $79
GPS GPS-18 USB $67
Total $3385
B. Camera and Lens
The camera used for this system is manufactured by The Imaging Source. The following are the cameras
specifications provided by the manufacturers. The camera’s sensor is a ½ inch Sony ICX205AL progressive
scanning CCD chip with a resolution of 1280 by 960 pixels, the exposure limits are from 1/10000th of a second to
60 minutes, and selectable frame rates of 15, 7.5, and 3.75 frames per second, it uses a USB 2.0 interface for power
and connection to the computer, and is a cube of 5.0 cm on each side. This camera is sold for astronomy uses. The
lens utilized for this system is a Nikon 35mm f/1.8G. It provides an approximately 12 degree field of view when
coupled with the above camera. Finally, a C-mount adaptor must be used to convert the lens connection to the
threaded camera connection.
3. American Institute of Aeronautics and Astronautics
3
Figure 1: Camera and Lens
C. Tracking Mount
A commercially available azimuth/elevation telescope mount with accompanying handheld controller from
Celestron is utilized in this system. The hand controller provides either manual control of the mount or computer
control via a serial computer connection and software. The hand controller can be used to align the mount and point
at celestial objects but will not allow the mount to track satellites as a standalone device. To track satellites the hand
controller must be connected to a computer to drive the mount via tracking software that sends real time azimuth and
elevation command inputs during a satellite pass.
Figure 2: Camera/Lens on Tracking Mount
4. American Institute of Aeronautics and Astronautics
4
D. Tracking and Data Handling Computer
The current setup utilizes a desktop replacement classed Toshiba brand laptop. This computer is utilized to drive
the tracking mount and record video data during operation. After data recording, the computer is utilized to post
process the recorded data into usable data for determining satellite characteristics. The same computer is also used
for pre-pass planning. For the current system setup a laptop allows the setup to be highly mobile. In the future the
setup could be adapted to be more permanent and the computer will be remotely controlled off station via an internet
or local network connection. On the mobility side, preliminary tests have been run using a netbook (~$250).
Indications are that a small inexpensive netbook would be able to run the associated software with no compromises
except for screen resolution if substituted for the tracking and data handling computer. The biggest computational
draw is post-processing, which may still have to be done on a larger computer.
Figure 3: Tracking & Data Handling Computer
E. Associated Software
Initially the system setup utilized the following software: Satellite Tracker, IC Capture (astronomy version 2.2),
and Matlab. Additionally, Google Earth, VirtualDub, Iris, and SkyTools3 were utilized as secondary software for
reference and post processing. Google Earth was used to determine an accurate latitude, longitude, and altitude
position for the observing site. Skytools3 was utilized for alignment, accuracy checks, and system characterization.
Satellite Tracker is the software used to drive the mount to track the satellites using the TLEs provided to it in a text
file. This software also predicts passes, but it does not provide a magnitude estimate for the predictions. IC Capture
is software provided by The Imaging Source with the camera. It allows for full control of the camera and video
recording in .avi format. Matlab was initially utilized only for data processing. VirtualDub is a freeware program
utilized as a tool to break up the video recordings into image sequences. Iris is also a freeware program and used to
normalize each frame to the satellite’s position. The software then analyzes the satellite’s brightness value in each
frame recorded, providing an output data file of the brightness information. This initial setup consisted entirely of
commercial off-the-shelf hardware and software. It can be implemented by anyone for a relatively small cost.
Improvements, some of which taken away from the commercial off-the-shelf nature of the system, are described in
section IV.
5. American Institute of Aeronautics and Astronautics
5
F. Pass Predictions & TLE Sources
During pre-observation planning, visible satellite passes are estimated using Heavens-above.com. This site is
utilized over pass prediction software because it is easy to use and free of charge, and also because Heavens-above
provides an estimated magnitude value for each pass. The magnitude value is needed so that the exposure can be
estimated for the camera to insure consistent recordings. This also guarantees an estimate that the satellite can be
observed within the limits of the setup. Additionally, the website provides these predictions in a listed format, so a
plan can be developed to maximize the number of passes that can be observed. This is accomplished by using the
rise and set times, and allowing for about a two minute window of transition to reposition the camera to the next
satellite’s rise position. The best way to create an observation schedule is to copy the Heavens-above table into
Microsoft Excel. This allows for the highlighting of the passes to be observed, exposure estimates to be calculated,
and notes to be taken during the pass that can be easily saved.
To accurately track the satellites, a TLE source with the most up to date TLEs is needed. The satellite TLEs were
acquired from Space-track.org. This website requires a user to register with the site for access, but provides TLEs
updated daily from NORAD in a text file format. They can also be copied directly from the site to a blank text file.
An alternative website that does not require a login for the most current TLEs is celestrak.com. This website
provides lists of the TLEs by the satellites mission type, and the listings must be copied from the webpage to a text
file. TLEs for some objects that are not available on Space-track.org3
or celestrak.com4
can be found on Heavens-
above.com5
. These TLEs are from an unknown source, but have been found to accurately predict satellite location.
The solution to the lack of TLEs from Space Track is to copy the TLEs from the orbit page for the satellite on
Heavens-above and paste them into the TLE file utilized for the observations. After observations are made, the TLE
data text files are saved for future reference and post processing of data.
IV. Developments and Capabilities
This section will describe the system components and their discovered capability limits. Problems with each
component will be addressed with some solutions or recommended alternatives provided. Developments and
improvements to the system that have been implemented will be described in detail.
Several operational limits of the camera were explored. The camera takes time to start and stop acquiring
frames; the device lags typically less than half of one second every time it is commanded to stop or start acquiring
data. While acquiring data the camera has shown some signs of dropping frames and has moments of lagging/hang
ups during recording; this is noted from the video play back. The loss of one frame from a pass of 600 or more
frames is not detrimental to data reduction involving light intensity analysis. However this problem has caused
accuracy concerns if this data is used in the future to determine orbital elements. This is one reason the current
research has focused on characterization of the satellite itself by observing changes in brightness.
Figure 5 is an example of a raw data from from a satellite tracking session where the satellite is the dot near the
center of the image and the streaks are from nearby stars.
6. American Institute of Aeronautics and Astronautics
6
Figure 5: Example of Raw Data Frame.
For research involving satellite brightness data, a relation between exposure and object magnitude and a test of
the system’s recording limit was needed to define how dim an object it can record were both needed. The magnitude
to exposure relation was developed from test runs of differing gain and exposure values to maximize the background
stars and minimize their streaks with the satellite in frame. From observing the playbacks, the highest quality video
was chosen as the desired result of future data. The video settings of gain and exposure were the only setting
changed. The gain value was set to stay the same and the exposure value became the variable to relate to magnitude.
Using the astronomy equation for magnitude an equation relating magnitude to exposure time was determined to be
the following6
:
(1)
This equation is specific for this setup and was developed by Lt Col Thomas. This equation is tied to systems
with the same camera and lens configuration. Also this equation normalizes the images to have the same background
to satellite brightness relation. For the dimmest object system recording limit, the test consisted of using the
histogram plot observing a known magnitude stationary object, the 4.3 magnitude Andromeda galaxy, and observing
when the image background was too saturated to be used for analysis. The test was performed with IC Capture in
live view mode window with the settings of 950 for gain and brightness of zero. The exposure value was increased
until the histogram showed a majority of the pixels having values in the upper half of the range and the image
showed signs of background saturation. The test yielded a maximum exposure of 9.709 seconds which means the
maximum satellite magnitude observation limit of 6.2749 based off equation one. Testing was done on two
satellites, Cosmos 2233 and Spot 1/Viking Rocket, the first with magnitude 5.6 and the other with magnitude 5.2.
They proved that with 4.741 and 3.4 second exposures that a satellite could stay in the center frame for a long
exposure and not streak by utilizing estimates of equation 1. So dim objects can be tracked without any issues, but
provide less data due to a smaller sampling rate.
Additionally an error in how far off the time stamp is relative to each observing image was accessed for
characterization of the system's current setup. This error was observed to vary with exposure, but it is typically less
than 0.09 to 0.06 seconds off. This estimate is based on a test using internally developed Matlab software. The test
consisted of calculating the time from when the camera is triggered to when it checks if the exposure is completed.
The exposure time is subtracted off this total time. It was assumed that the check to determine if the exposure was
completed was infinitely small With this assumption, the difference in total time and the exposure time yielded the
time error. Also, the accessing of the system clock for the time step takes less than a millisecond. A test like this
could not be completed on IC Capture due to the inability to access the source code to setup the needed test lines for
7. American Institute of Aeronautics and Astronautics
7
timing the processes. Tests were run though that show that the starting time stamp values written to the recording
files are accurate to the nearest second.
The computer used in the setup is powerful enough to record and process the videos with no issues other than the
power settings that can limit the processors speed. Newer computing processors used in this newer computer have
power saving settings which step down the processing speed with usage to conserve energy. The power settings
within Windows need to be set to ‘High Performance’ mode. Also the computer needs to be run on the AC power
adaptor and not the battery to reduce lagging in the programs utilized for tracking.
Limits on the tracking mount have surfaced resulting in some slew/positional limits for accurately recording a
satellite. The main limitation of the mount is that observation passes that have maximum elevation values above 80
degrees will create high slew rates that could reach the maximum slew limit of the azimuth axis of the mount.
Additionally, the higher elevation passes and slew rates will cause the recording to loose site of the satellite for the
amount of time it takes the mount slew its azimuth axis around to track the decent of the satellite’s pass. The reason
the mount swivels around instead of tracking over the top is due to the fact it is designed for telescopes. This creates
an elevation limit of 90 degrees and requires the mount to track the ascending path of the satellite to nearly max
elevation before it must swivel around to track the decent of the pass. A possible solution to this problem might be
to adjust the maximum elevation limit in Satellite Tracker or within the Nexstar handheld controller. The high slew
rate passes tend to cause slight miss- alignment for future passes. This could be an issue created by the encoders the
mount utilizes to measure its current pointing position as it slews. The former issue is only a hypothesis; there has
been an observed minor difference in a satellites initial position in frame following a high rate pass. The issue has
not been prominent enough to cause large errors, but should be noted for future development at higher
magnifications.
Furthermore, the mount has sensitive setup limits for alignment and the precision of the alignment is limited due
the low magnification of the lens currently used. The mount must be leveled before each observation run, because
the mount is moved after each session. The leveling insures the accuracy of the alignment of the mount with the sky.
This must be done because the scope might not align, but even if it does align, it might not align accurately enough
to frame the satellite correctly as it is tracked. The precision of the alignment due to the lens used is not a prominent
issue but must be taken into account when aligning the mount because one needs to be a consistent as possible when
centering objects in the frame when accomplishing the alignment process. If this minor issue is not kept in mind.
issues could occur trying to keep the satellite framed in the center throughout a passes due the slight drift of the
satellite in the frame over the course of a pass (a nominal occurrence.) The issue of the mount failing to align at all
causes valuable time to be lost during the setup process.
Additionally, it must be noted that most of the alignments for observation runs have utilized the solar system
object alignment method by aligning on Jupiter. The team initially used the three star alignment methods and had
some difficulties with alignment due to the needed precision centering an object in frame. This caused large delay in
setup time and the missing of planned observations. Because Jupiter was visible sufficiently before the brighter stars
were and during this part of the project’s time, the team utilized the solar system object alignment method. It proved
to be the quickest and sometimes most accurate alignment due to the fact one uses a planet as the only object that
has to be centered in the frame.
Originally, several different freeware programs were used to provide the full range of functionality necessary for
this project. The telescope mount’s hand controller was used to align the scope, usually with three individual stars or
planets. The program Satellite Tracker was used to connect to the telescope and track satellites based on pre-
prepared TLEs. IC Capture 2.2 was used to connect to the camera and record video of the pass. For initial data
reduction VirtualDub was used to separate the video out into individual frames for analysis. Ideally, software could
be developed that combines all of these abilities into only one program. While this has not yet been accomplished,
significant steps have been taken towards this goal.
Currently, two Matlab GUIs have been created that combine the functionality of the hand controller, Satellite
Tracker, IC Capture, and VirtualDub. The first, FSTrack, was developed to provide mount control and tracking.
FSTrack has the ability to align the scope, if it is situated on a level surface, and update that alignment if the setup if
moved. It can update the computer’s system clock if necessary form the USNO website including a user input UTC
offset. Different observation locations can be preprogramed into a separate file that will read in the specified
location for use in providing tracking information. FSTrack can also get cloud coverage data form
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weatherunderground.com for the specified ground location. FSTrack will also load pass prediction data for satellites
as low as 4.5 magnitude from Heavens-above.com. This information includes satellite NORAD number, pass
duration, times, max elevation, and azimuth and elevation data for pass beginning and ending. This information is
also specific to the ground location. In terms of mount control, FSTrack includes four way direction controls that
can be used to calibrate the mount by pointing it at Polaris. It will also allow the telescope to track satellites from
TLEs loaded into a text file. A lag, lead feature allow the program to delay or speed up tracking in order to center
the satellite in the frame. This is often necessary if the TLE’s are old or the computer clock was not updated
recently. All of this functionality was originally included in Satellite Tracker, the mount’s hand controller, and
manually accessing Heavens-above.com and weather sites. A second Matlab program, FSCamera, was developed to
incorporate the functionality of IC Capture and VirtualDub. FSCamera is able to interface with the camera to
provide a live preview of the image and record data. The images are recorded as an image sequence as opposed to a
video file, eliminating the need for VirtualDub altogether. FSCamera saves each image with the name of the
satellite, the frame number, the time stamp from that exposure, and the mount’s azimuth and elevation at the time of
the exposure. IC Capture was not able to communicate with Satellite Tracker; so azimuth and elevation data was
never available. Currently, this information is derived from the input TLEs. However, in the future, this collected
data could contribute to orbit determination projects for satellites with unknown TLEs. While IC Capture has more
control over some aspects of the camera including white balance, brightness, contrast, etc. FSCamera only included
the ability to control exposure and gain, as it was found that these were the only controls necessary to achieve proper
picture quality.
Figure 4: Screen shot of FSTrack
The system as a whole is designed as a mobile setup which creates positive and negative limitations. Without a
permanent shelter for the mount setup, one has to take the mount out to the observation location each session, level
it, reset the handheld clock, focus the camera, and align the mount. This causes longer setup times resulting from the
tedious setup process. If in the future a permanent location could be acquired, the mount would not have to be
repositioned and aligned for each test, because the mount can be “parked” in its last known configuration. If this
solution becomes available the setup time would be limited only by starting up the computer tracking software and
doing a quick alignment check.
V. Results
Once the limitations of the setup were understood, the idea of determining satellite size or aspect ratio based off
brightness was set as the research goal. This goal has shown some promising results as development in the model
used to draw this information out of the observation data is being collected. This goal not only requires data
recordings, but ways to determine the true brightness of the satellite. The true brightness is determined by taking
into account the effects of the atmosphere and illumination due to the observing angle and the angle of the sun to the
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satellite. By taking into account these factors and comparing the results with the ideal case of a perfect spherical
satellite, a model for the size ratio of the observed satellite has been developed.
VI.Conclusion
Over the course of past six months this low cost, portable satellite tracking system has been developed, tested,
and improved upon a number of times. Future improvements of a permanent remotely controllable system are being
developed to further the system's usefulness. Additionally, automation software is being developed to help make the
system more efficient to use and gather data so more time can be focused on the determination of the characteristics
of the satellite. The system has provided data to develop a mathematical reduction model to determine satellite
dimensional characteristics based solely of their recorded light intensity curves.
Acknowledgements
Michael Jones and Shane Bruski would like to thank Dr. Scott Dahlke and Lt Col Neil Thomas for guiding and
directing this research.
References
1. Wallace, S., et al., "Use of the Raven Optical Sensor for Deep Space Orbit Determination", Proceedings of
the AAS/AIAA Astrodynamics Conference, August, 1997
2. Earl, Michael A., et al. "Progress in Research and Development on the CASTOR K Satellite Tracking
Facility," Canadian Aeronautic and Space Institute (CASI) Astro2000 Conference, Ottawa, Ontario Canada, 9
November 2000.
3. United States Strategic Command, "Space-Track.org The Source For Sapce Surveillance Data," URL:
https://www.space-track.org/ [cited 13 March 2012].
4. Kelso, T.S, "CelesTrak," Public Domain Satellite Tracking Data, URL: http://celestrak.com/ [cited 13 March
2012]
5. Peat, Chris, “Heavens Above,” Public Domain Satellite Tracking Data, URL: http://www.heavens-
above.com/ [cited 13 March 2012].