05/06/2000 | Posted by Thierry at 04:40 PM
As of 1 May 00, the US's GPS Selective Availability (SA) has been set to zero. That means that not only is the GPS Lat/Long more accurate, but that also the GPS altitude in all GPS units, including IGC-approved Flight Recorders, is much more accurate. This is all because the clock dithering which was what SA being on meant, is no longer taking place.
The GNSS Subcommittee of the FAI Gliding Commission (IGC) is in the process of evaluating the resulting GPS Flight Recorder accuracy now that SA is set to zero. They are asking for flight records from this year's competitions, in order to check the increased accuracy due to the switching off of the "selected availability".
Contact Ian Strachan for further details.
