Elements Of Remote Sensing
‘A’ and ‘B’ are two towers of equal height diametrically opposite on either side of the nadir point, at 3 km and 5 km distances. Which one of the following statements is correct?

Height displacement of A and B will be towards each other
Height displacement of A will be less than that of B
Height displacement of B will be less than that of A
Height displacement of A and B is equal

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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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