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Elements Of Remote Sensing

Elements Of Remote Sensing
Repetitive observations of the same area at equal interval of time are useful to monitor the dynamic phenomena:

Snow cover
All of these
Vegetative cover
Cloud evolution

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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
For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is:

230 km
130 km
500 km
250 km

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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:

cos²θ
sec²θ
sin²θ
tan²θ

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Elements Of Remote Sensing
The basic requirement of any sensor system is:

Spatial resolution
Radiometric resolution
All of these
Spectral resolution

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Elements Of Remote Sensing
Electromagnetic radiation:

Once generated, remains self-propagating
Produces a time varying magnetic field and vice versa
Is capable to travel across space
All of these

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