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

All of these
Spatial variation
Temporal variation
Spectral variation

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Elements Of Remote Sensing
Earth observations from a satellite platform provide:

Constant solar zenith angles and similar illumination conditions
Synoptic view of a large area
All of these
Repetitive observations of the same area with intervals of a few minutes to a few weeks

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Elements Of Remote Sensing
Which one of the following statements is correct regarding the GPS satellites?

The inclination of axis satellite is 55°
The satellite transmits two L band signals (L1 with 1575.42 MHz and L2 with 1276.6 MHz)
All of these
The nominal altitude is about 20,200 km

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