ppt on remote sensing system
Post on 20-May-2015
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Presented byBCA-3A
(Kreatipedia)
The gathering of information from an object or surface without direct contact.
Lithosphere
Biosphere
Remote Sensor
Reflecting surfaces
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
Passive Remote Sensing Photography Radiometers Infrared
Active Remote Sensing RADAR LiDAR
Geology
Environmental monitoring
Commercial forestry
Reconnaissance mapping
Forestry
Agriculture
Hydrology
Sea Ice
Land Cover &
Land Use
Spectral Signatures
Image Acquisition
Spatial Resolution
Spectral Resolution
Multispectral Images
Radiometric Resolution
signatures produced by wavelength-dependent absorption
the ratio of reflected energy to incident energy as a function
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
a function of the design of the sensor
detectors in a remote sensor measures energy received from a finite patch of the ground
surface
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
Quantized incoming energy
analyze the numerical values in the bands of a multispectral image
High Resolutions Low Resolution
Optical System Panchromatic imaging system Multispectral imaging system Super spectral Imaging System Hyper spectral Imaging System
RADAR System
LiDAR 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.
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
Uses a multi channel detector and records radiation with a narrow range
Brightness and color informatics are available
Finer spectral feature that capture by the sensors.
RAdio Detection And Ranging
Object detection system which uses electromagnetic waves determine range, direction or
speed
Detect the presence of an object at a distance Detect the speed of an object Map something
Echo Doppler Shift
Light Detection And Ranging Measures distance by sending pulses of
laser light that strike and reflect from the surface of earth.
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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