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Elements Of Remote Sensing

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

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

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

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

All of these
Planktan
Lambert
Snell’s law

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Elements Of Remote Sensing
The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called:

Passive sensors
None of these
Sensors
Active sensors

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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
The interaction of the electromagnetic radiation produced with a specific wave length to illuminate a target on the terrain for studying its scattered radiance, is called:

Passive remote sensing
None of these
Neutral remote sensing
Active remote sensing

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