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#9
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![]() "Tauno Voipio" wrote in message ... There is one fundamental difference to other means of IFR navigation: It is impossible to test and approve the GPS signal. For the other NAVAIDs the station can be measured on ground and fly the measuring flights and compare the results with the specs in ICAO Annex 10, and that's it. Been there - done that. Why is it impossible to test the GPS signal? |
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