Remote sensing involves gathering information about an object without direct contact. It has been used since the 1850s for aerial photography from balloons and developed further for military purposes. Satellites now allow remote sensing on a global scale. Common applications include geology, environmental monitoring, forestry, agriculture, and mapping land use. Remote sensing uses sensors that detect reflected electromagnetic radiation to form images. Key concepts include spectral signatures, spatial and spectral resolution, and multispectral imaging. Active sensors like radar and lidar also measure distance using electromagnetic pulses.

3. Presented by BCA-3A (Kreatipedia )

4. The gathering of information from an object or surface without direct contact.

5. Lithosphere Biosphere Remote Sensor Reflecting surfaces

6. 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

7. Passive Remote Sensing Photography Radiometers Infrared Active Remote Sensing RADAR LiDAR

8. Geology Environmental monitoring Commercial forestry Reconnaissance mapping

9. Forestry Agriculture Hydrology Sea Ice Land Cover & Land Use

11. Spectral Signatures Image Acquisition Spatial Resolution Spectral Resolution Multispectral Images Radiometric Resolution

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

13. 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

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

15. 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

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

17. High Resolutions Low Resolution

18. Optical System Panchromatic imaging system Multispectral imaging system Super spectral Imaging System Hyper spectral Imaging System RADAR System LiDAR System

19. 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.

20. 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

21. Uses a multi channel detector and records radiation with a narrow range Brightness and color informatics are available

22. Finer spectral feature that capture by the sensors .

23. RAdio Detection And Ranging Object detection system which uses electromagnetic waves determine range, direction or speed

24. Detect the presence of an object at a distance Detect the speed of an object Map something Echo Doppler Shift

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

26. http://www.howstuffworks.com/radar.htm http://www.google.co.in/#sclient=psy-ab&hl=en&source=hp&q=radiometric+resolution+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