Civil Engineering :: Elements of Remote Sensing
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Snow cover on the earth surface :
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The emission of electrons from a metal plate exposed to light depends on the :
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The range measurements in GPS are made with :
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A time varying magnetic field produces an electric field'. This phenomenon is known as
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For obtaining accurate distance of the satellite
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GPS has been widely recognized as accurate, fast and cost-effective method for the following:
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Electromagnetic waves are characterised by :
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For accurate position fix, the three satellites:
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Pick up the correct statement from the following:
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A.
Water molecules and salt-ions in the ocean scatter the lower wave length more |
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B.
An increase in the back scattering coefficient with shorter wave length gives a deep blue colour for clear oceanic water |
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C.
The ratio of the upwelling irradiance just below the surface and downwelling irradiance just above the surface is called reflectance ratio. |
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D.
All of these |