Elements Of Remote Sensing
Which one of the following statement is correct?

The radiant energy which falls upon a surface is termed as irradiance
Radiant energy expressed in Joules, is the energy associated with electromagnetic radiation
The rate of transfer of radiant energy is called flux and is expressed in watts
All of these

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

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

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