Elements Of Remote Sensing
Consider the following statements regarding the satellite imaging:
1. The satellite orbit is fixed in the inertial space
2. During successive across-track imaging, the earth rotates beneath the sensor
3. The satellite images a skewed area
Which one of the following statements is/are correct?

1, 3
2, 3
1, 2, 3
1, 2

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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 25 km
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 5-10 km from reference station

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