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Elements Of Remote Sensing

Elements Of Remote Sensing
The changes in the reflectivity/emissivity with time, is called:

Spectral variation
Spatial variation
Temporal variation
None of these

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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/8 cos θ
h = λ/8 cos θ
h > λ/Δ cos θ

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Elements Of Remote Sensing
Orbital radius of GPS satellites is approximately:

18,400 km
36,000 km
15,200 km
26,600 km

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Elements Of Remote Sensing
Which one of the following frequency regions is a part of sun's radiation?

Radio frequency region
Infrared frequency region
All of these
Ultraviolet frequency region

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Elements Of Remote Sensing
The various stages occuring in GPS system are described below: 1. Generation of an output to the user 2. Detection of the GPS signals 3. Processing the data in the built-in-computer 4. Decoding the GPS signal.The correct sequence of the stages is:

2, 3, 4, 1
1, 2, 3, 4
3, 1, 2, 4
2, 4, 3, 1

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Elements Of Remote Sensing
The optical property of a water body depends on:

Scattering by the suspended particulate matter
Absorption by the dissolved material
All of these
Absorption by the suspended particulate matter

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