Download - Ppt on remote sensing system
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Presented byBCA-3A
(Kreatipedia)
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The gathering of information from an object or surface without direct contact.
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Lithosphere
Biosphere
Remote Sensor
Reflecting surfaces
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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
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Passive Remote Sensing Photography Radiometers Infrared
Active Remote Sensing RADAR LiDAR
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Geology
Environmental monitoring
Commercial forestry
Reconnaissance mapping
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Forestry
Agriculture
Hydrology
Sea Ice
Land Cover &
Land Use
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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 Earth’s surface 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 received from 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
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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 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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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
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Uses a multi channel detector and records radiation with a narrow range
Brightness and color informatics are available
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Finer spectral feature that capture by the sensors.
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RAdio Detection And Ranging
Object detection system which uses electromagnetic waves determine range, direction or
speed
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Detect the presence of an object at a distance Detect the speed of an object Map something
Echo Doppler Shift
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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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http://www.howstuffworks.com/radar.htm http://www.google.co.in/#sclient=psy-ab&hl=en&source=hp&q=radiometric+resol
ution+of+remote+sennsing&psj=1&oq=radiometric+resolution+of+remote+sennsing&aq=f&aqi=&aql=&gs_sm=e&gs_upl=550721l558445l1l558664l24l23l1l0l0l18l900l12399l4-10.9.3l22l0&bav=on.2,or.r_gc.r_pw.&fp=4df500c34198b13e&biw=1280&bih=869
http://www.crisp.nus.edu.sg/~research/tutorial/image.htm http://www.google.co.in/search?
tbm=isch&hl=en&source=hp&biw=1280&bih=869&q=Active+remote+sensing&gbv=2&oq=Active+remote+sensing&aq=f&aqi=g1&aql=&gs_sm=e&gs_upl=9704l15125l0l15442l21l18l0l8l8l0l770l2764l5-2.2l4l0#hl=en&gbv=2&tbm=isch&sa=1&q=spatial+resolution+in+remote+sensing&oq=spatial+resolution+in+remote+sensing&aq=f&aqi=&aql=&gs_sm=e&gs_upl=75737l79409l6l79639l18l13l0l0l0l8l900l4886l4-1.6.1l8l0&bav=on.2,or.r_gc.r_pw.&fp=37c75e80de715eb4&biw=1280&bih=869
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