Ulisse Perusin a écrit :
Hi List,
I just installed TTTracklog on my TTOne, and it works like a charm :)
I'm planning to use it as a paragliding flight recorder.
I know that TT is made to work on the streets, and altitude data may be
inaccurate, but I'd like to give it a spin up in the air.
What I found is that there is no setting to fix the altitude according
to the geoid correction[1], so my "trial flight" (fake, by foot) went
all about 40 m over the real altitude.
I don't think to a system that calculates the correction basing on the
GPS coords, it would be too much work for the tiny TT processor. I think
a custom fixed value (maybe in the wrapper) to be added or subtracted
from the NMEA altitude could be enough for the use.
Hi Ulisse ,
Do you know ttMaps ? It is a software for TomTom made for off-road
navigation. You can put your own maps (including aeronautical charts),
record the tracks, and replay them. And the altitudes are corrected.
You can get it at http://jrepetto.free.fr/ttmaps/en/index.html
Regards,
Jean-Claude
