February 12, 1997

MEMORANDUM TO:  Record
FROM:           Dennis A. Keyser -- W/NP22
Subject:        Changes to OI/SSI-Data Preprocessor
                (July 12, 1995 Version -- UPDATE # 7)

The July 12, 1995 version of the data preprocessor program
(PREPDATA) was updated for the seventh time.  UPDATE #7 was
implemented on 1200 UTC 31 January 1997 on the CRAY.  All changes
now affect only OBUFR = TRUE switch.  Except where noted, the
changes below affect both the GLOBAL and RGL/ETA models.
At implementation time, PREPDATA still used ON29 file input.  The
conversion to JBUFR input was as follows:

     AVN (530,532) 12Z 04 February
     FNL (830,860) 12Z 05 February
     MESO (667)    12Z 11 February
     EDAS (881)    12Z 12 February
     ERL  (240)    12Z 12 February
     RGL  (340)    12Z 12 February


*********************  U P D A T E   # 7  ***********************


I.  GENERAL CHANGES

      1) New NAMELIST switch IACFTL(4) replaces IACARL.  Can now
specify FLOOR for all 4 aircraft types (default is IACFTL =
100,3*2286).  If reports are below floor, they are flagged for
non-use by analysis.  TEMPORARY: If AIREP/PIREP or ASDAR/AMDAR
report below floor, it is tossed rather than flagged.  ACARS
below floor are flagged.  NOTE: FOR NOW, THE NEW IW3GAD ACTUALLY
FILTERS OUT AIREP/PIREP AND ASDAR/AMDAR REPORTS BELOW FLOOR
BEFORE THEY EVER GET TO PREPDATA. (MAIN, GETC06)
  - for ON29 input: GBL: = default
                    RGL: = default for 1-3, IACFTL(4)=0
                           (as before)
  - for BUFR input: GBL: = default
                    RGL: = default for 1-3, IACFTL(4)=0









      2) New namelist switch AIFNOW, when set to FALSE for any of
the 4 aircraft types, will flag that type's mass report for non-
use by the analysis when the corresponding wind report is missing
(default is AIFNOW = 4*FALSE).  TEMPORARY: If AIFNOW=F for
AIREP/PIREP or ASDAR/AMDAR reports, it is tossed rather than
flagged.  ACARS with AIFNOW=FALSE are flagged.  NOTE: FOR NOW,
THE NEW IW3GAD ACTUALLY FILTERS OUT ALL TYPES OF REPORTS WITH
MISSING WIND BEFORE THEY EVER GET TO PREPDATA. (MAIN, GETC06)
  - for ON29 input: GBL: = default
                    RGL: = default 
   - for BUFR input: GBL: = default
                     RGL: = default

      3) New namelist switch IPRFTP added to specify type of
input wind profiler data set (=1 - WMO BUFR; =2 - JBUFR). 
Default is IPRFTP = 1. (MAIN, PREP).
  - for ON29 input: GBL: = default
                    RGL: = default
  - for BUFR input: GBL: = IPRFTP=2
                    RGL: = IPRFTP=2

      4) Added call to new subroutine W3UNPK77, to decode reports
from JBUFR wind profiler data set when NAMELIST switch IPRFTP=2.
(MAIN, PREP).

      5) GBL and RGL BUFR input: Namelist switches JSURFM(3),
JSURFM(7) set to 9999 to exclude pmsl bogus from processing
(these are not yet available in bufr dumps). (MAIN, SFCDTA).

      6) GBL and RGL BUFR input: Namelist switch MBOGUS set to
FALSE to exclude satellite moisture bogus from processing (this
is not available in bufr dumps and in fact is not longer
processed by NESDIS/SAB). (MAIN, PREP).

      7) RGL BUFR input: Namelist switch IEDSTP set to 2 to input
TOVS retrievals in unpacked NMCEDS format from JBUFR dump file.
(MAIN, SATEDS).

      8) GBL BUFR input: Namelist switch TOVBFR set to TRUE to
input TOVS 40-level retrievals and radiances from JBUFR dump
file.  (In version 6, no TOVS data was present in PREPBUFR file.)
(MAIN, PREP).