Elements Of Remote Sensing
Pick up the important characteristic of a target which facilitates its identification from the following:

Temporal variation
Spectral variation
All of these
Spatial variation

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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
All of these
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

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