On Sep 27, 9:52*am, "PCool" wrote:
Martin,
* * * * * * *there were no changes for wind calculations in the code, and
normally we found the wind calculation in xcsoar to be very accurate while
thermalling...but only if we have a good and correct position reporting from
gps. It has come to my attention the fact that there is an important problem
with the 31X gps (made for car navigation, and not for air navigation).
I am trying to fix it adjusting internal parameters in the Sirf-Titan
chipset, but it's not trivial.
Since the problem does not appear in straight flight, I'm going to add wind
calculation for straight flying which should solve the problem once forever.
Otherwise, check your gps antenna if you are not using a 31X.

paolo

"Martin Gregorie" ha scritto nel .. .

BTW, on Friday I was flying with LK8000a9 and noticed that while I was
thermaling the wind was being reported as 4 kts @ 260-270, but after I'd
been in cruise for a while it had switched to 11 kts @ 350. This switch
was consistent through the flight. The IGC trace shows that the
thermaling wind parameters were correct, so no surprise there.

Has anybody else seen this happening and, if so, which version were you
running? I'm curious to know whether its LK8000 specific or if it affects
the main branch code (5.2.3 / 5.2.4) as well.

--
martin@ * | Martin Gregorie
gregorie. | Essex, UK
org * * * |

Can anyone explain why my wind calculation always reads "0". I can set
it manually but cannot seem to get the autocalc to work. My old setup
on another PDA worked fine.

Thanks in advance!
Adam