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172 - ATPL Question Bank in English - Almanac data stored in the receiver of the satellite navigation system NAVSTAR/GPS is used for the:

Question 172 - Radio Navigation - ATPL - Airline Transport Pilot Licence

Recognition whether Selective Availability (SA) is operative
Predicting which satellites should be visible and narrowing the search for their ranging codes.
Correction of receiver clock error
Assignment of received PRN-codes (Pseudo Random Noise) to the appropriate satellite

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