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INTRODUCTION


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Remote sensing

system The gathering of information from an object or surface

without direct contact.


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Types Passive Remote Sensing

Photography

Radiometers

Infrared

Active Remote Sensing

RADAR LiDAR


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Applications Forestry

Agriculture

Hydrology

Sea Ice

Land Cover & Land Use


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Techniques Spectral Signatures

Image Acquisition

Spatial Resolution

Spectral Resolution

Multispectral Images

Radiometric Resolution


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signatures produced by wavelength-dependent

absorption.

the ratio of reflected energy to incident energy as a

function.


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radiant energy that is measured by an aerial or

satellite sensor

electromagnetic energy returned from the Earthssurface can be detected by a light-sensitive film.


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a function of the design of the sensor

detectors in a remote sensor measures energy receivedfrom a finite patch of the ground surface


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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


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Quantized incoming energy

analyze the numerical values in the bands of a

multispectral image


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High Resolutions Low Resolution

Multi Spectral Hyper Spectral:


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System Used Optical System

Panchromatic imaging system

Multispectral imaging system

Super spectral Imaging System

Hyper spectral Imaging System

RADAR System

LiDAR System


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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.


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Panchromatic Imaging SystemA 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


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Multispectral Imaging System Uses a multi channel detector and records radiation

with a narrow range

Brightness and color informatics are available


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


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RADAR System Radio Detection And Ranging

Object detection system which uses electromagnetic

waves determine range, direction or speed


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How it Works Detect the presence of an object at a distance

Detect the speed of an object

Map something

Echo

Doppler Shift


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LiDAR System Light Detection And Ranging

Measures distance by sending pulses of laser light that

strike and reflect from the surface of earth.


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REFERENCES http://www.howstuffworks.com/radar.htm

http://www.physicalgeography.net/fundamentals/

2e.html

www.howstuffworks.com

www.remotesearch.in

http://www.tutavivito.com
http://www.howstuffworks.com/radar.htmhttp://www.physicalgeography.net/fundamentals/2e.htmlhttp://www.physicalgeography.net/fundamentals/2e.htmlhttp://www.howstuffworks.com/http://www.remotesearch.in/http://www.tutavivito.com/http://www.tutavivito.com/http://www.remotesearch.in/http://www.howstuffworks.com/http://www.physicalgeography.net/fundamentals/2e.htmlhttp://www.physicalgeography.net/fundamentals/2e.htmlhttp://www.howstuffworks.com/radar.htm


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