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SUBJECT:        Monthly Raob Data Report of Manual Quality Control


The Raob Report for July, 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 34 U.S. stations (Blocks 72 and 74) were cited at least
once; 17 were cited at least twice; and 6 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
                    72201/KEY                   5        5
                    72403/LWX   3                   1    4
                    72469/DNR   3                   1    4
                    72662/UNR                   3   1    4

Station KEY reported ground equipment failures from the 9th through the 12th,
and UNR reported ground equipment failures on the 19th and 21st.  UNR also
reported a flight equipment failure on the 15th.  Most manual deletions at
both stations were for temperatures and moisture due to super-adiabatic lapse
rates.

(2)  Reports from 45 stations in blocks 04, 70, 71, 76, 78 and 91 were cited
at least once; 27 were cited at least twice; and 17 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
                    76692/HYY                  52       52
                    76654/MZL                  40       40
                    76405/LAP                  27   1   28
                    76256/GYM                  26       26
                    76458/MZT   2              20       22
                    76644/MID                  17       17
                    76225/CUU   2               7        9
                    71081/YUX   6                        6
                    78897/PTP   4                   1    5
                    78988/CUR   5   4                    5*
                    91765/PPG   5                        5
                    70316/CDB   1               2   1    4
                    76903/TAP   3                   1    4
                    78486/SDQ   4                        4


Flight equipment failures were commonplace at stations HYY, MZL, LAP, and GYM.
MZT also reported flight equipment failures from the 1st through the 6th and 
again from the 21st through the 27th, MID reported flight equipment failures
from the 4th through the 8th and the 14th through the 20th, and CUU reported
flight equipment failures on the 23rd, 25th through 28th, and 31st.  Station
MID reported power failurs on the 9th and 10th.  Ground equipment failures were
reported by MID on the 23rd and 26th through 27th, CUU on the 7th, and CDB on
the 22nd and 28th.

There were a variety of reasons for manual deletions in July.  Super-adiabatic
lapse rates were the most common reason for deletions at PPG.  Spurious surface
temperatures were deleted several times at station YUX.  At station CUR, four
out of five deletions were a result of baseline errors.  At station TAP, two
out of three deletions were a result of spurious winds near the surface.
Finally, at station SDQ, three out of four deletions were due to spurious
heights at 150mb or higher.

* 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/pmb/qap/raobqc/