Andy wrote:
http://www.onlinecontest.org/olc-2.0...l?dsId=1875776

I wonder how this "flight" could have got through even the most basic
reasonableness check. I assume there is none.

The OLC web site checks just the mathematical correctness of the G
record, but afaik it does not do any plausibility checks. That would
be quite error prone und unreliable, probably too annoying and not
worth it.

This flight however looks interesting. It was supposedly recorded
with a Colibri. He has another suspicious flight:

http://www.onlinecontest.org/olc-2.0...tId=1022483629

I wonder how the "pilot" managed to do this. Can this possibly be a
GPS reception problem or hardware/software bug, or did he fake the G
record on a made-up IGC file?

Faking G records should be reasonably easy to do. When vendors keep
their cryptographic specifications secret, it always smells a lot like
snake oil. My rough guess is that no certified IGC logger would
withstand a real cryptanalysis.

Max