Elements Of Remote Sensing
Electromagnetic spectrum contains:

All of these
Ultraviolet rays (wave length < 10⁻⁶ m)
Gamma rays (wave length < 10⁻¹⁰ m)
Infrared rays (wave length < 10⁻⁴ m)

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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
Signal propagation biases due to the sphere and troposphere propagation
All listed here

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