This presentation consist of remote sensing, types of remote sensing and also about the radiometers systems. I have also discussed about the types of radiometers system and how it work. I have also discussed about the principle on which it works. Also I have discussed about the applications .
Basic Concepts, Explanation, and Application. Fundamental Remote Sensing; Advantage/ disadvantages, Imaging/non Imaging sensors, RAR and SAR, SAR Geometry, Resolutions in the microwave, Geometric Distortions in SAR, Polarization in SAR, Target Interaction, SAR Interferometry
Basic Concepts, Explanation, and Application. Fundamental Remote Sensing; Advantage/ disadvantages, Imaging/non Imaging sensors, RAR and SAR, SAR Geometry, Resolutions in the microwave, Geometric Distortions in SAR, Polarization in SAR, Target Interaction, SAR Interferometry
Many electronic (as opposed to photographic) remote sensors acquire data using scanning systems, which build up and produce a two-dimensional image of the surface.
Scanning systems can be used on both aircraft and satellite platforms and have essentially the same operating principles.
A scanning system used to collect data over a variety of different wavelength ranges is called a multispectral scanner (MSS), and is the most commonly used scanning system.
Types
Across-track scanning
Along-track scanning
This content presents for basic of Synthetic Aperture Radar (SAR) including its geometry, how the image is created, essential parameters, interpretation, SAR sensor specification, and advantages and disadvantages.
This presentation cover description of microwave remote sensing, Active and Passive Microwave remote sensing, RADAR, Slant range distortion like Foreshortening and Layover, Sar image and some Recent works in where microwave remote sensing has used to detect natural calamities
Meteorology is a discipline concerned with observational earth sciences and theoretical physics. It has the task of providing an accurate knowledge of the state of the atmosphere. Before the advent of weather satellites the weathermen had been severely handicapped by having only a very limited knowledge of the state of the atmosphere at any given time. Meteorological satellites have to a large extent has enabled to overcome this deficiency.
Many electronic (as opposed to photographic) remote sensors acquire data using scanning systems, which build up and produce a two-dimensional image of the surface.
Scanning systems can be used on both aircraft and satellite platforms and have essentially the same operating principles.
A scanning system used to collect data over a variety of different wavelength ranges is called a multispectral scanner (MSS), and is the most commonly used scanning system.
Types
Across-track scanning
Along-track scanning
This content presents for basic of Synthetic Aperture Radar (SAR) including its geometry, how the image is created, essential parameters, interpretation, SAR sensor specification, and advantages and disadvantages.
This presentation cover description of microwave remote sensing, Active and Passive Microwave remote sensing, RADAR, Slant range distortion like Foreshortening and Layover, Sar image and some Recent works in where microwave remote sensing has used to detect natural calamities
Meteorology is a discipline concerned with observational earth sciences and theoretical physics. It has the task of providing an accurate knowledge of the state of the atmosphere. Before the advent of weather satellites the weathermen had been severely handicapped by having only a very limited knowledge of the state of the atmosphere at any given time. Meteorological satellites have to a large extent has enabled to overcome this deficiency.
This is all about remote sensing. Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object and thus in contrast to on-site observation, especially the Earth.Remote sensing is the process of detecting and monitoring the physical characteristics of an area by measuring its reflected and emitted radiation at a distance from the targeted area. Special cameras collect remotely sensed imagesof the Earth, which help researchers "sense" things about the Earth.
As in the modern days this Presentation covers the breif description about the introduction of Remote Sensing to the students of Civil Engineering with Basic concepts
This presentation covers the principles of remote sensing and reflectance profiling and explains how the concept of spectral signature is utilized in entomology research
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Remote sensing is the process of detecting and monitoring the physical characteristics of an area by measuring its reflected and emitted radiation at a distance (typically from satellite or aircraft).
Special cameras collect remotely sensed images, which help researchers "sense" things about the Earth.
Transmission system used for optical fibers Jay Baria
In this presentation I have explained various types of transmission system used for optical transmission and also described about the budget method that has to be followed while selecting an source for optical fibers and also about the factors that should be consider while selecting an source.
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Classification of signals and systems as well as their properties are given in the PPT .Examples related to types of signals and systems are also given .
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Looking for the best engineering colleges in Jaipur for 2024?
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Harnessing WebAssembly for Real-time Stateless Streaming PipelinesChristina Lin
Traditionally, dealing with real-time data pipelines has involved significant overhead, even for straightforward tasks like data transformation or masking. However, in this talk, we’ll venture into the dynamic realm of WebAssembly (WASM) and discover how it can revolutionize the creation of stateless streaming pipelines within a Kafka (Redpanda) broker. These pipelines are adept at managing low-latency, high-data-volume scenarios.
NUMERICAL SIMULATIONS OF HEAT AND MASS TRANSFER IN CONDENSING HEAT EXCHANGERS...ssuser7dcef0
Power plants release a large amount of water vapor into the
atmosphere through the stack. The flue gas can be a potential
source for obtaining much needed cooling water for a power
plant. If a power plant could recover and reuse a portion of this
moisture, it could reduce its total cooling water intake
requirement. One of the most practical way to recover water
from flue gas is to use a condensing heat exchanger. The power
plant could also recover latent heat due to condensation as well
as sensible heat due to lowering the flue gas exit temperature.
Additionally, harmful acids released from the stack can be
reduced in a condensing heat exchanger by acid condensation. reduced in a condensing heat exchanger by acid condensation.
Condensation of vapors in flue gas is a complicated
phenomenon since heat and mass transfer of water vapor and
various acids simultaneously occur in the presence of noncondensable
gases such as nitrogen and oxygen. Design of a
condenser depends on the knowledge and understanding of the
heat and mass transfer processes. A computer program for
numerical simulations of water (H2O) and sulfuric acid (H2SO4)
condensation in a flue gas condensing heat exchanger was
developed using MATLAB. Governing equations based on
mass and energy balances for the system were derived to
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6th International Conference on Machine Learning & Applications (CMLA 2024)ClaraZara1
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Technical Drawings introduction to drawing of prisms
Remote sensing & Radiometers Systems
1. Laxmi Institute of Technology, Sarigam
Department of Electronics & Communication Engineering
(7 SEM)
SUB: Microwave Engineering (2171001)
Presentation
On
Radiometers Systems
Submitted by:-
Name: EnrollnmentNo.
Jay Baria 150860111003
Approved by AICTE, New Delhi; Affiliated to Gujarat Technological University,
Ahmedabad
2. Content
• Remote sensing
• Types of Remote sensing
• Active Remote sensing
• Passive Remote sensing
• Radiometers
• Principle of operation
• Design
• Types of Radiometers
3. Remote Sensing:
• It is a technique with good potential to help the
nations economic growth and solve some of its
problems.
• It includes better management of natural resources
like,
1. Wasteland mapping
2. Identifying flood prone area
3. Estimating forest area
4. Types of Remote Sensing :
1. Active microwave remote sensing
2. Passive microwave remote sensing
5. Active Remote Sensing
• It uses active sensors like camera to sense the
natural calamities
• The main advantage is that we can retrieve the
information at any time i.e, day, night or any
season.
6. Passive Remote Sensing
• Passive microwave remote sensing are known as radiometers.
They sense natural radiations originating from earth surface.
• This sensing is also known as atmospheric sounding.
• The atmospheric sounding gives vertical profile of temperature &
molecular constituents with respect to the molecular resonance
frequency.
7. Radiometers
• Microwave radiometers are very sensitive receivers designed to
measure thermal electromagnetic radiation emitted by
atmospheric gases.
• Microwave radiometers are utilized in a variety of
environmental and engineering applications, includes weather
forecasting, climate monitoring, radio astronomy and radio
propagation studies.
• It performance depends on the object size, different obstacles in
the path of signal, atmosphere temperature.
8. Principle of operation
• Solids, liquids but also gases emit and absorb microwave
radiation.
• The amount of radiation a microwave radiometer
receives is expressed as the equivalent blackbody
temperature also called brightness temperature.
• In the microwave range several atmospheric gases exhibit
rotational lines.
• They provide specific absorption features which allow
to derive information about their abundance and vertical
structure.
9. Radiometer Applications
• Soil moisture
• Snow water equivalent
• Sea/lake ice extent, concentration and type
• Sea surface temperature
• Atmospheric water vapor
• Surface wind speed
• Cloud liquid water
• Rainfall rate
only over the oceans
10. Difference between Passive and Active
Systems
• Passive remote sensing systems record electromagnetic
energy that is reflected or emitted from the Earth’s surface
and atmosphere
• Active sensors create their own electromagnetic energy that
1) is transmitted from the sensor toward the terrain,
2) interacts with the terrain producing a backscatter of energy
3) is recorded by the remote sensor’s receiver.
12. Design
• A microwave radiometer consists of an antenna system,
microwave radio-frequency components (front-end) and a
back-end for signal processing at intermediate frequencies.
• The atmospheric signal is very weak and the signal needs to be
amplified by around 80 dB.
• Therefore, often heteorodyne techniques are used to convert
the signal down to lower frequencies that allow the use of
commercial amplifiers and signal processing. Increasingly low
noise amplifiers become available at higher frequencies, i.e. up
to 100 GHz, making heteorodyne techniques obsolete.
• Thermal stabilization is highly important to avoid receiver
drifts.
13. Types of Radiometers
1. Total power radiometer
2. Dicke radiometer
3. Satellite borne radiometer
4. Pushbroom and synthetic aperture radiometer
14. Dicke Radiometer
• The most common form of microwave radiometer
was introduced by Robert Dicke in 1946 in the
radiation laboratory of Massachusetts Institute of
Technology to better determine the temperature of the
microwave background radiation.
15. Synthetic-aperture radiometers
•The underlying idea of the synthetic-aperture radiometer is that
with an array of receiving elements, multiple beams can be
formed simultaneously to image a swath.
•This is accomplished by cross-correlated signals from a pair of
antennas with overlapping fields of view.
16. Satellite Borne radiometer
•Soil moisture is a key factor in determining humidity in the
atmosphere and the formation of precipitation. These data will also
aid researchers studying plant growth and vegetation distributions.
An artist's concept of the
Soil and Moisture
Observation Satellite
(SMOS) satellite with
deployed solar arrays and
instrument
17. Satellite borne radiometer
•These radiometer operates in the L-band of the electromagnetic
spectrum in a band (1400-1427 MHz) reserved (by the
International Telecommunications Union) for space research, radio
astronomy and a radio communication service between Earth
stations and space, known as the Earth Exploration Satellite
Service.
•Since its 2009 launch and system check out, project scientists
noticed that over certain areas the MIRAS radiometer data were
badly contaminated by radio-frequency interference (RFI).
•The unwanted signals have mainly come from TV transmitters,
radio links and networks such as security systems. Terrestrial
radars appear to also cause some problems.
19. Microwave Radiometer Ground-Based
Networks:
• MWRnet is a network established in 2009 of scientists
working with ground-based microwave radiometers.
• MWRnet aims to facilitate the exchange of information in the
MWR user community fostering the participation to
coordinated international projects.
• In the long run, MWRnet’s mission aims at setting up
operational software, quality control procedures, data formats,
etc. Similar to other successful networks.