Elements Of Remote Sensing
Geodimeter is based on:

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

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

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

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