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SUBJECT:        Monthly Raob Data Report of Manual Quality Control


The Raob Report for May, compiled from the Raob Recap statements in the
SDM logs, which does not necessarily include data that were rejected by
automated computer generated quality control, indicates the following:

(1)  Reports from 31 U.S. stations (Blocks 72 and 74) were cited at least
once; 8 were cited at least twice; and 3 were cited at least three times.
Of those, the following were cited more than three times or had two or more no
reports:

                    STATION__ DEL BAS COR XRP EFL SHO TOTAL

(2)  Reports from 36 stations in blocks 04, 70, 71, 76, 78 and 91 were cited
at least once; 18 were cited at least twice; and 11 were cited at least three
times.  Of those, the following were cited more than three times or had two or
more no reports:

                    STATION__ DEL BAS COR XRP EFL SHO TOTAL
                    76458/MZT   1              30       31
                    76692/HYY   3              28       31
                    76654/MZL   6              21       27
                    76256/GYM                  25       24*
                    71126/ZED  14                       14
                    76405/LAP   1              13       14
                    70398/ANN                  10       10
                    76526/ZAC   2               4        6
                    76805/ACA                   6        6
                    71119/WSE   5                        5
                    91765/PPG   5                        5

Flight equipment failures were common at stations MZT, HYY, MZL, GYM, and LAP.
Station ACA also reported a few flight equipment failures along with a few
ground equipment failures.  A few ground equipment failures were also reported
by stations ZAC and ANN.  At station HYY, there were some issues with low
heights and cold temperatures, and at station MZL, high heights and warm 
temperatures were the most common cause for manual deletions.  At WSE and PPG,
temperatures and moisture were deleted due to super adiabatic lapse rates.  
Finally, in the first half of the month, numerous manual deletions were needed
due to erratic data from station ZED.

* The total differs from the sum of the itemized citations
  because of multiple citations in the same raob(s).


Citation Codes Key:
DEL  All or part of the raob was flagged for deletion.
BAS  A baseline hgt/station press error was corrected or purged.
COR  At least one correction other than baseline was made.
XRP  Station sent no report at all when one was required.
EFL  Equipment failure (codes 10142, 10144, 10158, etc.)
SHO  Raob flight was short; ie, to less than 400 mb.


This and related reports are available on the Web at . . .
http://www.nco.ncep.noaa.gov/sib/qap/raobqc/