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Elements Of Remote Sensing

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

26,600 km
15,200 km
18,400 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:

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

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Elements Of Remote Sensing
Consider the following statements regarding the satellite imaging:
1. The satellite orbit is fixed in the inertial space
2. During successive across-track imaging, the earth rotates beneath the sensor
3. The satellite images a skewed area
Which one of the following statements is/are correct?

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

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Elements Of Remote Sensing
A perfectly black body:

All listed here
Absorbs all the radiations of every wave lengths
Is a diffuse emitter
Emits power of every wave length

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Elements Of Remote Sensing
Electromagnetic radiation:

Is capable to travel across space
Once generated, remains self-propagating
Produces a time varying magnetic field and vice versa
All of these

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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:

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

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