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Elements Of Remote Sensing

Elements Of Remote Sensing
Which one of the following geometric errors of satellite sensors is random?

Panoramic distortion
Earth rotation
Scan skew
Altitude variation

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Elements Of Remote Sensing
DGPS is based on the concept that bias errors in the position of locations in a given local area, are same if their distances are within

50 km
75 km
25 km
100 km

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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 time varying electric field produces a magnetic field.' This phenomenon is called:

Hertz's law
Ampere Maxwell's law
Faraday's law
Kirchoff’s law

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Elements Of Remote Sensing
A perfectly black body:

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

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Elements Of Remote Sensing
Formation of snow occurs if the cloud temperature is

None of these
Below the freezing point
At the freezing point
Just above the freezing point

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