[wxqc] Assistance Request

Gerry Creager gerry.creager at tamu.edu
Sat Dec 27 08:29:38 CST 2008


I'll try to look but I've had some system issues here.  I'll have to 
pull the native MADIS data and look.


Sam Drinkard wrote:
> Hi all,
>    For the past week or 10 days, I've been trying to "chase the graphs" 
> which I know is not what is the QC analysis is for, or for it to be used 
> as a guide.  Some time back, I began noticing my alt readings were 
> getting out of line, and initially, I thought it was due to some other 
> stations not reporting on a regular basis, as well as a few being really 
> whacked out of line with the spatial analysis.  I've tried to adjust my 
> alt reading to match KDNL, which is a few miles from my location, but 
> our elevations are very close.  At first, I was reading about 1mb low 
> compared to the analysis, so I tweaked the console about 1mb up, 
> thinking that should put me very close to KDNL's readings.  After seeing 
> my std deviation and mean errors continue to climb, I started bringing 
> it back down.  I thought I had things more or less in sync with DNL, but 
> alas, over the last few days, I've seen changes to the contrary.  Can 
> some of you who have access to the spatial analysis comparisons give me 
> a hint as to who or what station(s) are messing with the analysis?  I'm 
> getting very frustrated because I don't seem to be able to discern which 
> one(s) are causing the problems.  After 2+ years of rock solid 
> observations, then to have obs that appear to change with every cycle, 
> I've been tempted to just drop the whole bucket of rocks and just use 
> the data I collect for my own uses.  I've not eliminated hardware 
> problems, but after such a drastic change in reliability after several 
> years of use, it just does not sound right that hardware would cause the 
> problems.
>    Hint:  Gerry, if you have access to Patti's spatial comparisons, can 
> you peek at who I'm compared with for the past several days, and Patti, 
> if you have the time, likewise, or any of you who can help determine 
> what is going on?
> Sam
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Gerry Creager -- gerry.creager at tamu.edu
Texas Mesonet -- AATLT, Texas A&M University	
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.862.3983
Office: 1700 Research Parkway Ste 160, TAMU, College Station, TX 77843

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