ppt on remote sensing system

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