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Cheap GPS Loggers for FAI Badges - Status?



 
 
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  #11  
Old June 2nd 04, 09:19 AM
Paul Bart
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Hi

Without making these meteorological corrections, geometric and
calibrated pressure altitude can differ by as much as 1000 feet for a
Diamond altitude gain.


Marc


I do not know about the conversion process required to convert geometric and
I assume the actual within the bounds of GPS error altitude, to pressure
altitude. However given the assertion that the pressure altitude can differ
by as much as 1000ft from the geometric altitude, does it imply that two
pressure altitudes can actually differ by 2000ft? Would it not provide
sufficient argument to switch to geometric altitude?

Paul


 




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