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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- IIT JAM
- Geology (GG)
Define couple charged device in gis?
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Sajan sarthak
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Charge-coupled device, known as CCD, is very popular photodetector commonly used for digital imaging and video . CCD is based on a metal-oxide-semiconductor (MOS) structure. CCD structured with a p-type semiconductor body, a thin silicon dioxide insulating layer and an array of gating electrodes. A positive bias voltage applied on a gate electrode repels holes away from the area underneath the electrode, creating a depletion region. Incoming photons are able to generate photoelectrons in the depletion region as illustrated in below figure. These photon-induced charges are then shifted programmably in the horizontal direction to one side of the array so that they can be electrically amplified and collected.
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Rahul kumar![best-answer]()
CCD, also known as charged couple device, is an important type of sensor used in GIS for scanning purpose and data acquisition. CCD is generally consisted of a large number of photosensitive pixels packed together on a chip. Most sophisticated large format scanners use CCD's with eight thousands pixels per chip. Maximizing the number of chips can provide better information.