[Met_help] [rt.rap.ucar.edu #96714] History for FW: Question about V2.11 METViewer (UNCLASSIFIED)

[Julie Prestopnik via RT]

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Julie - 

Thanks for letting me know about the misg text. This is a forwarded copy below.
R/
John
________________________________________
From: Raby, John W CIV USARMY CCDC ARL (USA)
Sent: Monday, September 14, 2020 4:10 PM
To: 'met_help at ucar.edu'
Subject: Question about V2.11 METViewer (UNCLASSIFIED)

CLASSIFICATION: UNCLASSIFIED

CLASSIFICATION: UNCLASSIFIED

I have a database populated with 2376 Grid-Stat STAT files and I generated a
plot of FSS vs lead time shown the attached PNG file. The settings used for
this plot as as follows:

        Y1 series vrbl:  TMP --> NBR_FSS for WRF with ind vrbl: FCST_LEAD.
The aggregated statistics plotted were "Nbrhood method count" (NBR_CNT).
The R-data (attached) shows that the Nstat value for each lead time is
19800. See the line for the first lead time below.
        TMP     WRE-N_d03_1km    fcst_lead=3    NBR_FSS 1       NA      NA
19800

        From <http://carson2.arl.army.mil:8080/metviewer/servlet?jsp=new>

The plot shows perfect FSS values (1.0) for all leads. I have also attached
the  Rscript, xml, and log files.

Are the plotted aggregated FSS values at each lead averaged over all 8
thresholds and 24 neighborhood sizes (interp_pnts)? Is the NStat value
(19800) computed from the total number of FSS values available in the 2376
STAT files? (19800/2376=8.33). This seems to indicate that it was using the
values of FSS for each of the 8 thresholds, but why doesn't the math work
out to <8 since sometimes the value of FSS was "NA" at certain thresholds. I
guess I need to understand more about the computation of the FSS using thes
above settings.

I suppose that to break out the FSS for a specified combination of threshold
value and neighborhood size, I would add "fixed value" settings for each of
those plots to accomplish this, correct?


Thanks.

R/
John

Mr. John W. Raby
U.S. Army Research Laboratory
White Sands Missile Range, NM 88002
Office:(575) 678-2004 DSN 258-2004
Teleworking: Contact Admin Specialist at (410) 278-6974
FAX (575) 678-1230 DSN 258-1230
Email: john.w.raby2.civ at mail.mil

CLASSIFICATION: UNCLASSIFIED
CLASSIFICATION: UNCLASSIFIED


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