Elements Of Remote Sensing
The value of energy quantum for radiation of any frequency is proportional to:

The square of the frequency
The reciprocal of the energy
The frequency
The square root of the frequency

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Elements Of Remote Sensing
Which one of the following parameters is accurate for DGPS?

Positional accuracies ~ 5 - 10 m if rover is less than 5-10 km from reference station
Positional accuracies ~ 1 - 2 m if rover is less than 1-2 km from the reference station
Positional accuracies ~ 2 - 5 m if rover is less than 2-5 km from the reference station
Positional accuracies ~ 5 - 10 m if rover is less than 25 km

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