Elements Of Remote Sensing
Geodimeter is based on:

The visible light as carrier with frequency of the order of 5 × 1014 Hz
Propagation of modulated light waves
High frequency radio waves
Propagation of infrared radiation

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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
Constant solar zenith angles and similar illumination conditions
All of these
Synoptic view of a large area

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Elements Of Remote Sensing
Which one of the following residual biases involves the GPS accuracy?

Satellite dependent biases due to uncertainty in the orbital parameters of the satellite
Receiver-dependent biases due to clock stability with line
All listed here
Signal propagation biases due to the sphere and troposphere propagation

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