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

Spectral variation
Temporal variation
All of these
Spatial variation

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

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

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