Remote sensing system

1. Remote sensing system Mirza Muhammad Waqar Contact: mirza.waqar@ist.edu.pk +92-21-34650765-79 EXT:2257 RG610 Course: Introduction to RS & DIP

2. 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

3. Remote Sensing & Satellite Image Processing

4. 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.

5. 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.

6. Energy-Matter Interaction at Earth Surface • Remote Sensing would be simple if every material reflected or emitted energy in a unique, known way.

7. 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.

8. Data Processing & Supply Unit Manual Image Processing Digital Image Processing

9. Multiple Data Users • Urban Planner • Policy Makers • Engineers • Environmentalists • Glaciologists

10. 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

11. An Ideal Remote Sensing System

12. Questions & Discussion