Elements Of Remote Sensing
The various stages occuring in GPS system are described below: 1. Generation of an output to the user 2. Detection of the GPS signals 3. Processing the data in the built-in-computer 4. Decoding the GPS signal.The correct sequence of the stages is:

2, 3, 4, 1
1, 2, 3, 4
3, 1, 2, 4
2, 4, 3, 1

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

Receiver-dependent biases due to clock stability with line
All listed here
Signal propagation biases due to the sphere and troposphere propagation
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:

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

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