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#5
August 4th 06, 03:31 PM
posted to rec.aviation.piloting,rec.aviation.owning
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GPS loss of signal explanation
On Fri, 04 Aug 2006 09:37:44 -0400, Jonathan Goodish
wrote: In article .com, "Jay Honeck" wrote: http://www.scn.org/~bk269/gps.html This is an interesting site that explains why some pilots (seemingly mostly running Garmin-brand portable GPS units) are having trouble with losing satellite lock. We had a problem in our PA28 with a Skymap II (panel mounted GPS) when using an antenna on the top of the instrument panel. The culprit was the Narco IDME 825 and depended which frequency the DME was tuned. The DME transmitter blocked the GPS receiver. There was a considerable improvement when we fitted an external roof antenna. We have now fitted a Skymap IIIc GPS which is understand has a better receiver and so far appears ok. 
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