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
Which one of the following residual biases involves the GPS accuracy?

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

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