Martin,
I am on the US east coast in North Carolina.
I checked the magnetic declination for my area and it would explain the
difference I saw if one of the systems is displaying magnetic rather
than true directions. I don't recall
Under Set up>...>Look>InfoBoxSets>Cruise >Bearing>Content it says"True
bearing to the next waypoint." Under Track>Content it says "Magnetic
Track reported by the GPS". I was surprised these were not both n the
same reference system. If Bearing is true and Track is magnetic, that
would only explain one of them being different from what was displayed
on the GPS-Nav.
The only thing that appeared incorrect to me was the difference in the
Track and the Bearing between XCSoar and GPS-Nav. I did not notice
anything on the map that appeared inconsistent.
The difference was small enough that I would not have noticed if the
GPS-Nav was not available and even then I would not have reported it if
it did not sound similar to Fabrizio's post.
I may be adding confusion relative to Fabrizio's issue and I apologize
for that. I don't want to add any work to those who are doing such a
great job with XCSoar.
Regards,
Mike
On 6/12/2017 11:10 AM, Martin Kopplow wrote:
Just out of curiosity and to narrow down on the magnetic track issue: All you
are reporting happened in Italy, right? Or are we talking different locations
or even hemispheres? I can' t see trying different versions at random leading
anywhere.
What exactly was wrong? Value in info box, or track line on map? If one of the
above, was the track line different from the value in the info box? Was the own
position at the time displayed accurately? Was the same waypoint file used in
all cases? Was it accurate? Were the same prefs used? Was the wind set manually
or auto in all cases?
Before trying versions, I'd compare settings and data used, and make sure they
all match or are in fact fully supported by the actual version used, to exclude
possible sources of error.
Martin
mobile +49 171 7984740
Am 12.06.2017 15:11 schrieb Michael Rossi <mikeandmar...@gmail.com>:
I may not have been clear. I saw a consistent difference between the track
displayed by XCSoar and the track displayed by GPS-Nav. The same difference
appeared between the bearing displayed by XCSoar and the bearing displayed
GPS-Nav. This was true even when I wan not heading toward the turn point. I
cannot say which was correct.
I believe both units display bearing and track as True and not magnetic, though
if that is not true, it would explain a difference.
Mike
On 6/12/2017 2:42 AM, Ramy Yanetz wrote:
The reason for the discrepancies is probably the wind. With strong enough cross
wind the heading and bearing are not the same.
Ramy
On Jun 11, 2017, at 3:03 PM, Michael Rossi <mikeandmar...@gmail.com> wrote:
Don't know if this is related, but yesterday I noticed there was a consistent 8
to 10 degree difference in the Bearing and the track between XCSoar and my
Cambridge GPS-Nav.
I am running XCSoar 6.8.6 on a Samsung SM-J320V.
Displaying both traces on SeeU showed no difference in position, some
difference in altitude at the higher altitudes (200 ft difference at 5000').
This was the first time I had the phone mounted where I could see it throughout
the flight, so I cannot comment on earlier flights.
Regards,
Mike
On 6/11/2017 3:20 PM, Fabrizio Curreri wrote:
For information, today I flight with the 6.7.9 XCSoar Version, and I had no
problems. Same android device, Huawei Y6II Pro with android 6.0. And I checked
with accuracy, for 40 km from my base to it.
Regards
Fabrizio
Da: Fabrizio Curreri [mailto:fabrizio.curr...@srconsulting.it]
Inviato: domenica 11 giugno 2017 09:44
A: 'xcsoar-user@lists.sourceforge.net'; 'xcsoar-de...@lists.sourceforge.net'
Oggetto: Problem with right track on XCSoar
Yesterday I had the following problem: I’m going to my base right in front of
me, but the direction suggested from XCSoar was 30 degree to left. I know my
base, so it’s not a problem, but If I was in cross country …
I use XCSoar from many years, and this is first time that I have this problem.
My configuration:
Android device: Huawei Y6II Pro updated, with no sim and no app installed
XCSoar 6.8.6
It’s the second time I fly with android device. The waypoint file is the same I
used for many flyghts with IPAQ 3950 with GPS signal from Flarm XCSoar version
6.7.9 (but PPC2000 is no more supported, so I had to change platform).
Today I’ll try to load a precedent version of XCSoar for Android to verify.
Regards
Fabrizio
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