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Elements Of Remote Sensing

Elements Of Remote Sensing
Leaf reflectance depends primarily on:

Equivalent water content
All of these
Internal cell structure
The pigments

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Elements Of Remote Sensing
A passive sensor uses:

Its own source of energy
None of these
Sun as the source of energy
Flash light as a source of energy

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Elements Of Remote Sensing
For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is:

130 km
250 km
230 km
500 km

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Elements Of Remote Sensing
The basic requirement of any sensor system is:

Radiometric resolution
Spectral resolution
All of these
Spatial resolution

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Elements Of Remote Sensing
Which one of the following factors does not affect the scale of the air photographs?

None of these
Flying height
Focal length
Ground elevation

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Elements Of Remote Sensing
Coherence of two electromagnetic waves takes place if their phase difference is:

Constant in space
Constant in time
Constant in time and space
None of these

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