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Elements Of Remote Sensing

Elements Of Remote Sensing
Which one of the following factors does not affect the scale of the air photographs?

None of these
Ground elevation
Flying height
Focal length

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

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

Orbit drift
All of these
Altitude
Altitude variation

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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:

sin²θ
sec²θ
tan²θ
cos²θ

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Elements Of Remote Sensing
The changes in the reflectivity/emissivity with time, is called:

Temporal variation
Spectral variation
None of these
Spatial variation

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Elements Of Remote Sensing
Which one of the following parameters is considered to determine the reflectance of a vegetation canopy?

All of these
Azimuth angle
Look angle
Solar zenith angle

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