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Home > Exam Questions > ATPL - Airline Transport Pilot Licence > Radio Navigation > For an idealised, single-epoch GPS solution with three position coordinates and receiver clock bias unknown, assume equal independent pseudorange errors and no altitude aiding. Which geometry gives the best-defined solution among these choices?

334 - ATPL Question Bank in English - For an idealised, single-epoch GPS solution with three position coordinates and receiver clock bias unknown, assume equal independent pseudorange errors and no altitude aiding. Which geometry gives the best-defined solution among these choices?

Question 334 - Radio Navigation - ATPL - Airline Transport Pilot Licence

Three satellites, all at 45° elevation and separated by 120° in azimuth.

Four satellites, all at 10° elevation and separated by 90° in azimuth.

Three satellites at 10° elevation separated by 120° in azimuth, plus a fourth at the zenith.

Four satellites, all at 45° elevation and separated by 90° in azimuth.

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