At 04:39 PM 26/04/2012, you wrote:
I had a similar problem accessing a trace after doing a altitude
calibration on a volkslogger. No GPS signal obviously whilst in the
calibration chamber.
Strepla wouldn't recognise the trace saying that nothing was on the logger.
Tried SeeYou and it worked perfectly.
So maybe try another download program.
Peter
Strepla has a problem with just altitude traces. I've been unable to
find a switch to enable looking at these. All IGC loggers are meant
to record as barographs in the absence of GPS signals.
You can always look at an IGC file with a text editor. The B record
decode is in the FR specs on the FAI/IGC website. Basically time lat
long Pressure alt. GPS altitude and a fix accuracy number. Take a
look at a record and it will make sense. The header contains some
interesting information also.
Some cautions when looking at FR records:
When looking at short time interval events you need to be aware of
any filtering done by the FR before the record is stored. Both
pressure and GPS records may be filtered although more recent FRs are
better in this regard. I know of one investigation which was a
complete stuff up because this was ignored.
Mike
Borgelt Instruments - design & manufacture of quality soaring
instrumentation since 1978
www.borgeltinstruments.com
tel: 07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784 : int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia
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