This document discusses remote sensing systems. It begins with an introduction to remote sensing as gathering information from objects without direct contact. It then covers the history of remote sensing from early aerial photography to modern satellite systems. The document outlines different types of remote sensing including passive methods like photography and radiometers and active methods like RADAR and LiDAR. It provides examples of remote sensing applications and techniques. Finally, it describes different optical, RADAR, and LiDAR remote sensing systems and how they work.

2. INTRODUCTION

3. Remote sensing
system
 The gathering of information from an object or surface
without direct contact.

4. History
 1858 Balloonist G.Tournachon made photographs of
Paris from his balloon.
 Systematic aerial photography developed for military and
reconnaissance purposes beginning in World War I and
reaching a climax during the Cold War .
 Artificial satellites in the latter half of the 20th century.

5. Types
 Passive Remote Sensing
 Photography
 Radiometers
 Infrared
 Active Remote Sensing
 RADAR
 LiDAR

6. Applications
 Forestry
 Agriculture
 Hydrology
 Sea Ice
 Land Cover & Land Use

7. Techniques
 Spectral Signatures
 Image Acquisition
 Spatial Resolution
 Spectral Resolution
 Multispectral Images
 Radiometric Resolution

8.  signatures produced by wavelength-dependent
absorption.
 the ratio of reflected energy to incident energy as a
function.

9.  radiant energy that is measured by an aerial or
satellite sensor
 electromagnetic energy returned from the Earth’s
surface can be detected by a light-sensitive film.

10.  a function of the design of the sensor
 detectors in a remote sensor measures energy received
from a finite patch of the ground surface

11.  Parallel sensor arrays detecting radiation in a small
number of broad wavelength bands
 allow discrimination of different types of : vegetation,
rocks and soils,
clear and turbid water, and
some man-made materials

12.  Quantized incoming energy
 analyze the numerical values in the bands of a
multispectral image

13. High Resolutions Low Resolution
Multi Spectral Hyper Spectral:

14. System Used
 Optical System
 Panchromatic imaging system
 Multispectral imaging system
 Super spectral Imaging System
 Hyper spectral Imaging System
 RADAR System
 LiDAR System

15. Optical Remote System
 Optical remote sensing makes use of visible, near
infrared and short-wave infrared sensors to form images
of the earth's surface by detecting the solar radiation
reflected from targets on the ground.

16. Panchromatic Imaging System
 A single channel sensor is used to detect radiation
 If range of wavelength and the visible range become
same then the imagery will appear as a black and white
photograph taken from space

17. Multispectral Imaging System
 Uses a multi channel detector and records radiation
with a narrow range
 Brightness and color informatics are available

18. Super Spectral Imaging System
 Finer spectral feature that capture by the sensors.

19. RADAR System
 Radio Detection And Ranging
 Object detection system which uses electromagnetic
waves determine range, direction or speed

20. How it Works
 Detect the presence of an object at a distance
 Detect the speed of an object
 Map something
 Echo
 Doppler Shift

21. LiDAR System
 Light Detection And Ranging
 Measures distance by sending pulses of laser light that
strike and reflect from the surface of earth.

22. REFERENCES
 http://www.howstuffworks.com/radar.htm
 http://www.physicalgeography.net/fundamentals/
2e.html
 www.howstuffworks.com
 www.remotesearch.in
 http://www.tutavivito.com