Elements Of Remote Sensing
The remote sensing techniques applied for the earth's surface features, is generally confined to the following wave lengths:

All of these
0.4 to 1.3, 1.5 to 1.8, 2.2 to 2.6 μm
4.2 to 5.0, 7.0 to 15.0 μm and 1 cm to 30 cm
2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 μm

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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 ~ 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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