Elements Of Remote Sensing
The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called:

Reflectance
None of these
Albedo
Reflectance factor

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

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Elements Of Remote Sensing
Earth observations from a satellite platform provide:

All of these
Synoptic view of a large area
Constant solar zenith angles and similar illumination conditions
Repetitive observations of the same area with intervals of a few minutes to a few weeks

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