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Remote sensing
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- 2. What is RemoteSensing ? ? ?
- 3. Remote sensing means collectingdata from remote location without coming in contact with the object. WE CAN SAY…..
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- 5. Three Sides OfRemote Sensing Basic concept of Remote sensing Digital Image Processing Global Positioning System
- 6. Principle of Remote sensing Mappingthe earth surface features by reflected electromagnetic energy which is different for different object is measured by sensors on remote platform (satellite).
- 7. Various Components TheEnergy Source Interaction of Energy with Atmosphere Interaction of Energy with Target Recording of Energy by Sensor Transmission, Reception and Processing Interpretation and Analysis Application
- 8. Electromagnetic Spectrum Thelight which our eyes are able to see is comprised of seven colors which which is only a very small portion of EM spectrum coming from the sun to earth’s surface Energy coming fro the sun comprises energy wave length varying from 1/1000000 μm to
- 10. Energy Interaction with Objects EM energy when comes in a contact with objects, some energy is absorbed by the object and some energy is transmitted through the object. Energy Incident = Energy absorbed + Energy Transmitted + Energy Reflected EI = EA + ET + ER
- 11. Energy Interaction WithAtmosphere Reflected EM energy from the surface object passes through the atmosphere and reach through the satellite During transmission of waves some energy absorbed by gases and water vapor. Absorption and scattering of energy for certain selected waves only thus recording of EM energy by sensors is distributed in that particular length.
- 12. Energy Interaction withEarth Surface Features Here are some spectral response of main features of earth. • Vegetation • Soil • Water • Snow and Cloud
- 13. Remote Sensing Platforms I.Balloons II. Aeroplanes III. Helicopters IV. Satellites V. Spacecraft VI. Probes VII. Rovers VIII.Launch vehicles Move in atmosphere Perspective Photo with large error Un-economical Move in space of zero gravity Orthographic Images less errors Repetitive supply of images Initial Cost is more but looking to volume of images it is economical
- 14. Types Of Remote Sensing PassiveRemote Sensing Active Remote
- 15. Passive RemoteSensing : In remote sensing sun’s electromagnetic energy which is reflected by different object is received by sensors on satellite to create images is known as passive remote sensing. Active Remote Sensing : Active remote sensing makes use of sensors that detect reflect responses from objects that are irradiating from artificial generated energy sources, such as radar.
- 16. Types Of Images Panchromatic Remote Sensing Images Multispectral Remote Sensing Images Hyper spectral Remote Sensing Images Digital Images
- 17. Digital Images Processing Itmeans manipulating digital number of pixel for better viewing of image or scene. Digital Image process are as follows: Radiometric and geometric correction Image and enhancement Band Combination
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- 19. Functions Of GPS To provide coordinates like Latitude Longitude Elevation above mean sea level and time The Global positioning system is worldwide radio navigation system formed from a constellation of 24 satellites and their ground stations. GPS use this “artificial stars” as a reference point to calculate positions accurately.
- 20. Segments Of GPS Satellite constellation called space segment. The satellite constellation contains the satellites in orbit that provide the ranging signals and data messages to the user equipment.
- 21. Ground control/ Monitoring network called operational control segment. The OCS tracks and maintains the satellite in space. It also updates satellite clock corrections and ephemeris as well as well as other parameters essential for the determinations of user position velocity and time.
- 22. User receivingequipment called user equipment segment. The equipment segment performs the navigation, timing or other related functions.
- 23. Uses and ApplicationsSome ofthe uses and application, global, regional and local are as follows: • Navigation • Surveying
- 24. Navigation Marine Airnavigation
- 25. Surveying GPS is usefulto survey various data as follows: • Local property survey • Site survey • Topographical survey • Kinematic survey • Geodetic survey • Contour survey
- 26. INDIA & GPS India has launched “मंगलयान” or “Mars Orbiter Mission” The mission is a "technology demonstrator" project to develop the technologies for designing, planning, management, and operations of an interplanetary mission. It carries five instruments that will help advance knowledge about Mars to achieve its secondary, scientific objective. The spacecraft is currently being monitored
- 27. Yes, Ittu sastep & INDIA will independent in GPS ISRO is going to put one last satellite in IRNSS category to independent for GPS system. We are just one single step behind to be in queue of nations like America, Russia, China, France etc, who has separate GPS system.
- 28. International Star ISRO From 2013 to 2015 ISRO has launched two for Australia, five for Canada, one for Denmark Germany & Indonesia, seven for Singapore, six for UK, in total almost 28 satellite and got income of almost 86 million dollar.
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