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Elements Of Remote Sensing

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

Spatial variation
None of these
Spectral variation
Temporal variation

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Elements Of Remote Sensing
Due to perturbation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its

Six ground stations
Five ground stations
Three ground stations
Four ground stations

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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
The maximum sun's radiation occurs around:

0.7 μ wave length
0.55 μ wave length
0.4 μm wave length
None of these

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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
100 km
75 km
25 km

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

Radiometric error
Atmospheric window
Signature
None of these

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