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Elements Of Remote Sensing

Elements Of Remote Sensing
Which one of the following errors is produced by platform characteristics of the sensor?

Altitude
Orbit drift
Altitude variation
All of these

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

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Elements Of Remote Sensing
Which one of the following quantities forms the basis of radiometry?

Radiant energy (Q)
Radiant intensity (I)
Radiant flux (φ)
All of these

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Elements Of Remote Sensing
The most widely used antenna in GPS is

Parabolic antenna
Slotted antenna
Horn antenna
Microstrip antenna

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Elements Of Remote Sensing
Critical angle of electromagnetic radiation takes place if

Angle of incidence is equal to angle of refraction
Angle of refraction is equal to 90°
Angle of incidence is greater than the angle of refraction
Angle of incidence is equal to 90°

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

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

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