Elements Of Remote Sensing
The spectral region of the electromagnetic radiation which passes through the atmosphere without much attenuation is known as:

Atmospheric window
Ozone hole
Ozone window
Black hole

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

All of these
The nominal altitude is about 20,200 km
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)

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

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

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