Radio Navigationeasy#1182
GPS position dilution of precision (PDOP) depends on:
A
The number of satellites only
B
The atmospheric conditions only
C
The geometric arrangement of visible satellites
CorrectD
The aircraft speed
Explanation
PDOP is a measure of how satellite geometry affects position accuracy. Widely spread satellites give low PDOP (good geometry); clustered satellites give high PDOP (poor accuracy).
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