Re: [Paparazzi-devel] barometer or not?

[antoine drouin]

On Sun, Nov 1, 2009 at 6:04 PM, Chris <address@hidden> wrote:
> I just finished rewriting all the SCP1000 files including the use of the
> barometer as an alternative altimeter for the autopilot.
> The files affected are the baro_scp.x ,estimator.x and main_ap.x
> In simulation it works fine but i was wondering if the reading of this
> barometer are more accurate than the gps altitude especially know with EGNOS
> support.
> Any opinions?

It's not so much about accuracy than latency. GPS is filtered, so
lagging badly and also low bandwidth.
You have some GPS/baro data recorded from a couple of years ago in the
svn in the sw/in_progress/barometer directory if you wanna plot or
play with filters

> I am also writing some new files for the  SRF08  for use in auto landings
> now that after my heart problems i got me a nice two months leave.

I never got anything interesting from a ultrasonic sensor on fast
moving vehicles  (read fixed wing)

Regards

Poine