[wxqc] Sea Level Pressure

[Mike Barth]

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.
>
>
> At 12:00 PM 8/19/2005, you wrote:
>> Don,
>> 
>> CWOP "sea level pressures" are in fact the altimeter sea level
>> reduction, which is a function of elevation.  "Sea level pressure" as
>> defined here use the NWS sea level pressure reduction algorithm, which
>> is a function of both elevation and temperature.
>> 
>> On Thu, 18 Aug 2005, Don Palmer wrote:
>> 
>> > I just recently noticed that my sea level readings are listed under 
>> "Altimeter" beneath the heading of "Pressure In", where they list Pressure 
>> In, Sea Level Pressure and Altimeter.  What's with that?
>> >
>> > don
>> > CW2327
>
>
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