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Elements Of Remote Sensing

Elements Of Remote Sensing
The reflectance from a surface is called specular reflection if it follows:

Planktan
Snell’s law
All of these
Lambert

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Elements Of Remote Sensing
Rayleigh's criteria for a rough surface is: (where letters carry their usual meanings).

h > λ/8 cos θ
h > λ/Δ cos θ
h < λ/8 cos θ
h = λ/8 cos θ

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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:

230 km
250 km
500 km
130 km

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Elements Of Remote Sensing
Which one of the following errors is produced by platform characteristics of the sensor?

Orbit drift
All of these
Altitude variation
Altitude

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Elements Of Remote Sensing
The coherence length over which there is a strong relationship between amplitudes is;

The square of the bandwidth
None of these
Directly proportional to the bandwidth
Inversely proportional to the bandwidth

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Elements Of Remote Sensing
Which one of the following statements regarding remote sensing is correct?

Neither (A) nor (B)
The interaction of the electromagnetic radiation with the target
The emission of electromagnetic radiation from the target
Both (A) and (B)

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