Which one of the following parameters is accurate for DGPS?
A. Positional accuracies ~ 1 - 2 m if rover is less than 1-2 km from the reference station
B. Positional accuracies ~ 2 - 5 m if rover is less than 2-5 km from the reference station
C. Positional accuracies ~ 5 - 10 m if rover is less than 5-10 km from reference station
D. Positional accuracies ~ 5 - 10 m if rover is less than 25 km
Answer: Option A
This Question Belongs to Civil Engineering >> Elements Of Remote Sensing
Which one of the following factors does not affect the scale of the air photographs?
A. Focal length
B. Flying height
C. Ground elevation
D. None of these
The optical property of a water body depends on:
A. Absorption by the dissolved material
B. Absorption by the suspended particulate matter
C. Scattering by the suspended particulate matter
D. All of these
The infrared portion of EMR lies between
A. 0.4 - 0.7 μm
B. 0.5 mm to 1 μm
C. 0.7 - 1.3 μm
D. 0.7 to 14 μm
The phase difference of the waves 1 and 2 at A in the given figure is:
A. $$\frac{\pi }{4}$$
B. $$\frac{\pi }{2}$$
C. $$\pi $$
D. $$\frac{{3\pi }}{2}$$
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