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Remote sensing system. Mirza Muhammad Waqar Contact: mirza.waqar@ist.edu.pk +92-21-34650765-79 EXT:2257. RG610. Course: Introduction to RS & DIP. Outlines . Remote Sensing System The Energy Source The Atmosphere The Energy-Matter Interaction at the Earth’s Surface The Sensor
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Remote sensing system Mirza Muhammad Waqar Contact: mirza.waqar@ist.edu.pk +92-21-34650765-79 EXT:2257 RG610 Course: Introduction to RS & DIP
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
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 Manual Image Processing Digital Image Processing
Multiple Data Users • Urban Planner • Policy Makers • Engineers • Environmentalists • 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