[wxqc] Sea Level Pressure

[Mike Barth]

I don't know very much about the Davis data, so I might be wrong, but the
impression I had was that the calculation of sea level pressure (instead of
the desired altimeter) is done by the Davis Weather Link software.  If this
is correct, then VWS might be reporting the correct quantity.  Can someone
who knows more about Davis and/or VWS comment on this question?

Mike

On Wed, 7 Sep 2005 rich.taft at att.net wrote:

> I also have a VP2 using VWS.  I've been getting 97 of 97 errors on my QC report. Doesn't this mean that the pressure data that we VP2 users paid big bucks to collect is also being ignored by NOAA MADIS?
>
> I'm sure the VWS can provide both corrected and uncorrected data. If it’s putting the wrong data into the packet then that needs to be addressed with the Author of VWS.
>
> I'm a little unsure of what the problem with the data is.  Are you saying that VP2 does Temperature & Humidity compensation on the raw Pressure data prior to sending it to the Data logger, or is it something else?
>
> --
> Richard Taft
> www.taftphoto.com
> CW3815
>
> -------------- Original message ----------------------
> From: Mike Barth <Michael.F.Barth at noaa.gov>
>> 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
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