Re: [Paparazzi-devel] problem on altitude reference

[Eric BAHIER]

Hi Felix,


Thank for your help.

I have now based all my waypoint by "ground_alt+...".
My problem still the "automatic" ground_alt, in the past the 
"NavSetGroundReferenceHere()" set the ground_alt to the real alt.

Actualy I need to setup it in the flightplan.

Actualy use an old software version (november), I will move to the up to 
date version in few days.

 I will verify all that, and inform the paparazzi world on my progress

best regards,

Eric





Le 25/03/2011 19:06, Felix Ruess a écrit :
> Hi Eric,
>
> it sounds like your waypoints are specified with an altitude lower
> than your (actual) ground altitude.
>
> E.g. if in your flight plan you have alt="50" ground_alt="0", your
> default waypoint altitude (above mean sea level, not above ground) is
> set to 50m and your ground altitude to 0m.
> Now, if your ground altitude is actually 65m above sea level, the
> geo_init will set this. But your waypoints are still set to the 50m
> above sea level, so they will be -15m from your current altitude...
> So you should set alt to a value high enough so your waypoints will
> actually be over ground ;-)
> You can also use the height attribute of the waypoints, e.g.<waypoint
> name="4" x="-30.0" y="60" height="50."/>, which will place your
> waypoint 50m above ground.
>
> See also http://paparazzi.enac.fr/wiki/Flight_Plans
>
> Cheers, Felix
>
> On Sun, Mar 20, 2011 at 11:36 AM, Eric BAHIER<address@hidden>  wrote:
> > Hello,
> >
> > On a wings model, with a TINY board,
> >
> > NO problème in sim/simulation,
> >
> > problème only on ap/target....
> >
> > in the flight plan I have the classic  "
> >
> > <block name="Geo init">
> >        <while cond="LessThan(NavBlockTime(), 20)"/>
> >        <call fun="NavSetGroundReferenceHere()"/>
> >   </block>
> >
> > But after this "block" the altitude is set to the reel altidue (65m), the
> > target to 50m... and the objectif to -15m.....in simulation I have a
> > standard 50m  and 0/50m
> >
> > In the past it was OK, I have test with the basic flight plan "basic.xml"
> > from muret....the same mistake...My flight plan is now only few line....only
> > with stanby....to try to minimize a stupide mistake.....
> >
> >
> > I have try to use<call fun="NavSetAltitudeReferenceHere()"/>  , it can
> > not compile.....
> >
> >
> >
> > Any one have an idea?
> >
> >
> > Regards;
> >
> > Eric
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > ************************************
> >
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> >
> > Eric BAHIER
> > 15 chemin neuf
> > 34 980 Montferrier sur LEZ
> > France
> >
> > Tel : 33 4 67 59 92 53
> > Fax : 33 9 59 15 92 53
> > ************************************
> >
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Lez Concept EURL

Eric BAHIER
15 chemin neuf
34 980 Montferrier sur LEZ
France

Tel : 33 4 67 59 92 53
Fax : 33 9 59 15 92 53
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