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

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

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Elements Of Remote Sensing
Geodimeter is based on:

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

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