[wxqc] Re: Sea Level Pressure

[John Webb]

Thanks Mike. Do you have any idea what percentage of APRSWXNET stations 
have Davis equipment, and therefore are affected?

John Webb
C3212

At 12:01 PM 9/6/2005, you wrote:
>John,
>
>Sorry I didn't reply sooner...
>
>I'm afraid the QC processing doesn't have the ability to take into account
>that some APRSWXNET stations are reporting SLP instead of altimeter.  I 
>suggest
>you contact Davis about fixing this -- the APRSWXNET protocol requires
>altimeter.  In the meantime, you should ignore the QC results.
>
>Mike
>
>On Fri, 2 Sep 2005, John Webb wrote:
>
> > Can anyone comment on this?................................................
> >
> > --------------------------------------------------------------------
> > The Davis Vantage Pro II reports using sea level pressure reduction 
> algorithm
> > (elevation AND temperature corrections). I have noticed that QC takes this
> > and then corrects it again for temperature. This causes barometer QC for
> > Vantage stations to fluctuate significantly, especially after cold fronts.
> > Can this be programmed in QC? Fact is that Davis Vantage stations do not
> > report altimeter pressure.
> >