RE: [Paparazzi-devel] Flying Paparazzi near water

[mark.griffin]

There should be no problem with the Paparazzi thermal horizon detection
system whilst flying over water (provided there is no fog or cloud). 
As the temperature of the water (above 0 deg.C) is above that of the sky
(typical zenith temperature is about -15 deg.C), there should be
sufficient temperature difference.
Note that Paparazzi has been successfully flown in the arctic.

-----Original Message-----
From: address@hidden
[mailto:address@hidden On
Behalf Of Martin P
Sent: Wednesday, 18 February 2009 8:26 AM
To: address@hidden
Subject: Re: [Paparazzi-devel] Flying Paparazzi near water


> MAV05 took place in Garmisch-Partenkirchen in the middle of the Alps 
> and Paparazzi took the 4 first places. The accuracy of the attitude 
> estimation is degraded and hence the accuracy of navigation is 
> degraded too, but in a very acceptable way (ie, your circles might be 
> a little oval, but your aircraft wont turn upside down ).

That sounds good. 
I think that what aplies to attitude also aplies to roll. 

I guess that with a sophisticated systems such as paparazzi, the
regulator loops take care about this, although with a little error. 
I guess again that an easier system like the ArduPilot, which takes care
of attitude, roll, course and altitude separately might have troubles. 

Regards, Martin from Austria


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