Elements Of Remote Sensing
Spatial variation in horizontal and vertical directions is caused due to:

Biological weathering of rocks
All of these
Physical weathering of rocks
Chemical weathering of rocks

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Elements Of Remote Sensing
Which one of the following statement is incorrect regarding the electromagnetic radiation?

These are produced by the motion of electric charge
None of these
The oscillation of charged particles sets up changing electric fields
The changing electric fields induce the changing magnetic fields in the surrounding medium

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Elements Of Remote Sensing
Due to scan geometry of a satellite sensor:

The details towards the edge of the scan get compressed
The off-nadir resolution is degraded
The ground distance swept by the senor, IFOV is proportional to sec2θ, where θ is the angle of scan measured from the nadir
All of these

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Elements Of Remote Sensing
Which one of the following parameters is accurate for DGPS?

Positional accuracies ~ 5 - 10 m if rover is less than 5-10 km from reference station
Positional accuracies ~ 5 - 10 m if rover is less than 25 km
Positional accuracies ~ 2 - 5 m if rover is less than 2-5 km from the reference station
Positional accuracies ~ 1 - 2 m if rover is less than 1-2 km from the reference station

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