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Elements Of Remote Sensing

Elements Of Remote Sensing
In GPS, receivers are used are;

Mechanical clocks
Electronic clocks
Quartz clocks
Atomic clocks

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Elements Of Remote Sensing
Which one of the following helps to identify the objects on the earth surface?

Atmospheric window
None of these
Signature
Radiometric error

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Elements Of Remote Sensing
If θ is the angle of scan measured from the nadir, the ground distance swept by the sensor IFOV is proportional to:

sec²θ
cos²θ
sin²θ
tan²θ

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Elements Of Remote Sensing
Coherence of two electromagnetic waves takes place if their phase difference is:

Constant in time and space
Constant in space
None of these
Constant in time

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Elements Of Remote Sensing
If flying height of a spacecraft is H, the length of air base is B and the parallax difference between two points is dp, then the difference in height

h = (H/B) dp
h = dp/(B/H)
h = dp/(H/B)
h = (B/H) dp

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Elements Of Remote Sensing
Electromagnetic spectrum contains:

Gamma rays (wave length < 10⁻¹⁰ m)
Infrared rays (wave length < 10⁻⁴ m)
Ultraviolet rays (wave length < 10⁻⁶ m)
All of these

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