REMOTE SENSING SYSTEM Mirza Muhammad Waqar Contact mirza

REMOTE SENSING SYSTEM Mirza Muhammad Waqar Contact: mirza. waqar@ist. edu. pk +92 -21 -34650765 -79 EXT: 2257 RG 610 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

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 Manual Image Processing Digital Image Processing

Multiple Data Users 1. 2. 3. 4. 5. 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

An Ideal Remote Sensing System

Questions & Discussion