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REMOTE SENSING SYSTEM
Course: Introduction to RS & DIP
Mirza Muhammad WaqarContact:
[email protected]+92-21-34650765-79 EXT:2257
RG610
Outlines
Remote Sensing System The Energy Source The Atmosphere The Energy-Matter Interaction at the Earth’s Surface The Sensor The data processing and supply system The multiple data users
An ideal Remote Sensing System
Remote Sensing & Satellite Image Processing
The Energy Source
Active Remote Sensing => Own source of energy Passive Remote Sensing => Sun Energy
Solar energy level varies w.r.t time and location. For active remote sensing => Control on
illumination.
Sun energy is non-uniform w.r.t wavelength.
The Atmosphere
The atmosphere normally compounds the problems introduced by energy source variations.
Modify the strength and spectral distribution received by the sensor.
Define the wavelength ranges in which we can do remote sensing.
Energy-Matter Interaction at Earth Surface
Remote Sensing would be simple if every material reflected or emitted energy in a unique, known way.
The Sensor
No single sensor is sensitive to all wavelength. Ideal supersensor
How small an object on the earth can be seen. Spatial Resolution
All real sensors have fixed limits of spectral sensitivity.
Data Processing & Supply Unit
Digital Image ProcessingManual Image Processing
Multiple Data Users
1. Urban Planner2. Policy Makers3. Engineers4. Environmentalists5. Glaciologists
An Ideal Remote Sensing System
A Uniform Energy Source A noninterfering Atmosphere A Series of unique energy-matter
interaction at Earth’s surface A supersensor A real Time data Processing and Supply
System Multiple data users
An Ideal Remote Sensing System
Questions & Discussion
