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Re: [gembud] dcmetr: NAVCANADA LWIS Station data does not decode
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- Subject: Re: [gembud] dcmetr: NAVCANADA LWIS Station data does not decode
- Date: Thu, 18 Oct 2007 12:12:29 -0600
Stephen, Attatched is the modified mtgrpt.f routine. I tested and it does handle the LWIS. I haven't yet run on the realtime server to see if anything else has side effects. Steve On Thu, 2007-10-18 at 10:13 -0400, Stephen Sinnis wrote: > I am using GEMPAK5.10.3 on Linux FC5. > > My users identified that "SA" message observation data from Limited > Weather Information Service (LWIS), which are available on the NOAAPort > are not available in NWX. > > If I change the "LWIS" to "METAR" in the bulletin and re-inject to the > LDM/decoder combination, then it works fine. > > I looked at the dcmetr code and could not see where the issue was. > > Example NOAAPort LWIS: > > ^C^A^M^M > 921 ^M^M > SACN62 CWAO 181300^M^M > LWIS CYDL 181300Z AUTO 06002KT M02/M04 A2938=^M^M > LWIS CYDQ 181300Z AUTO 00000KT 00/M03 A2962=^M^M > LWIS CYER 181300Z AUTO 14004KT 05/ A2981=^M^M > LWIS CYLH 181300Z AUTO 09004KT 05/05 A2976=^M^M > CZMD NIL=^M^M > LWIS CZSJ 181300Z AUTO 09004KT 06/06 A2968=^M^M > ^M^M > ^M^M > > Has anyone seen a similar problem? > > Stephen Sinnis > Pelmorex Media Inc > T. 905.829.1159 x1379 > F. 905.829.5800 > _______________________________________________ > gembud mailing list > address@hidden > For list information or to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/ -- Steve Chiswell <address@hidden> Unidata
SUBROUTINE MT_GRPT ( bultin, lenb, bultyp, ibpnt,
+ rpttyp, report, lenr, corflg, iret )
C************************************************************************
C* MT_GRPT *
C* *
C* This subroutine gets the next report from a METAR/SPECI bulletin. *
C* Reports must begin with a four-character station id, and should end *
C* with '='. Reports are checked to see if they conform to the *
C* SAO format. The report type is saved to common. *
C* *
C* MT_GRPT ( BULTIN, LENB, BULTYP, IBPNT, RPTTYP, REPORT, LENR, *
C* CORFLG, IRET ) *
C* *
C* Input parameters: *
C* BULTIN CHAR* Bulletin *
C* LENB INTEGER Bulletin length *
C* BULTYP CHAR* Type of bulletin *
C* *
C* Input and output parameters: *
C* IBPNT INTEGER Pointer in bulletin *
C* *
C* Output parameters: *
C* RIVALS(IRTHRP) REAL Report type flag *
C* RPTTYP CHAR* Type of report *
C* REPORT CHAR* Report *
C* LENR INTEGER Length of report *
C* CORFLG LOGICAL Correction flag *
C* IRET INTEGER Return code *
C* 0 = normal return *
C* -1 = no station id found *
C* -2 = no more reports *
C* -3 = NIL report *
C** *
C* Log: *
C* D. Kidwell/NCEP 10/95 *
C* D. Kidwell/NCEP 12/95 Check for id at start of US reports *
C* D. Kidwell/NCEP 3/96 Simplified station id search *
C* D. Kidwell/NCEP 8/96 Removed references to TESTM, TESTS *
C* K. Tyle/GSC 11/96 Check for SAO's *
C* K. Tyle/GSC 1/97 Reorganize header and comments *
C* K. Tyle/GSC 3/97 Check length of station id; increase *
C* dimension of stid to 8 *
C* K. Tyle/GSC 4/97 Check for NIL reports and reports that *
C* begin with WMO bulletin ID *
C* D. Kidwell/NCEP 6/97 Removed call to ST_LSTR for stid; added *
C* explicit character length specification *
C* D. Kidwell/NCEP 6/97 Cleaned up code *
C* D. Kidwell/NCEP 4/98 New interface; removed iasos flag *
C* D. Kidwell/NCEP 9/05 CSC to add corflg *
C* S. Chiswell/Unidata 10/07 Added LWIS check *
C************************************************************************
INCLUDE 'mtcmn.cmn'
C*
CHARACTER*(*) bultin, report, bultyp, rpttyp
LOGICAL corflg
C*
LOGICAL found, saoflg, wmo
CHARACTER type*8, satype*3, stid*8
C-----------------------------------------------------------------------
iret = 0
lenr = 0
saoflg = .false.
wmo = .true.
corflg = .false.
C
C* Check for end of bulletin.
C
IF ( ibpnt + 7 .ge. lenb ) THEN
report = ' '
iret = -2
RETURN
END IF
C
C* Get report type.
C
rpttyp = ' '
ibeg = ibpnt
type = bultin ( ibeg:ibeg + 7 )
indxmt = INDEX ( type, 'METAR' )
indxsp = INDEX ( type, 'SPECI' )
indxlw = INDEX ( type, 'LWIS' )
C
C* Check for SAO format--found in pos. 5-6 in Canadian
C* and 6-7 in Alaskan rpts.
C
satype = bultin ( ibeg + 4: ibeg + 6 )
indxsa = INDEX ( satype, 'SA' )
indxap = INDEX ( satype, 'SP' )
IF ( ( indxmt .ne. 0 ) .or.
+ ( indxlw .ne. 0 ) ) THEN
rpttyp = 'MT'
ELSE IF ( indxsp .ne. 0 ) THEN
rpttyp = 'SP'
ELSE IF ( indxsa .ne. 0 ) THEN
rpttyp = 'SA'
saoflg = .true.
ELSE IF ( indxap .ne. 0 ) THEN
rpttyp = 'SX'
saoflg = .true.
END IF
C
IF ( rpttyp .eq. ' ' ) THEN
rpttyp = bultyp
IF ( bultyp .eq. ' ' ) rpttyp = 'MT'
ELSE IF ( indxap .eq. 0 .and. indxsa .eq. 0 ) THEN
IF ( indxlw .eq. 0 ) THEN
indx = MAX ( indxmt, indxsp )
ibeg = ibeg + indx + 5
ELSE
indx = indxlw
ibeg = ibeg + indx + 4
END IF
END IF
C
C* Find the next station id.
C
DO WHILE ( wmo )
IF ( rpttyp .ne. ' ' ) THEN
C
C* Check length of station id.
C
iblk = INDEX ( bultin ( ibeg:ibeg+8 ), ' ' )
IF ( iblk .eq. 0 ) THEN
stid = ' '
ELSE
stid = bultin ( ibeg:ibeg + iblk - 1 )
END IF
iens = ibeg + iblk
lens = iblk - 1
IF ( lens .eq. 4 ) THEN
found = .true.
wmo = .false.
ELSE IF ( lens .eq. 3 .and. saoflg ) THEN
C
C* Canadian SAO report.
C
found = .true.
wmo = .false.
ELSE
found = .false.
C
C* Check if report is mistakenly started with the WMO
C* bulletin ID, or for COR preceding the station id.
C
IF ( lens .gt. 0 ) THEN
IF ( stid .eq. wmohdr ( :lens ) ) THEN
ibeg = ibeg + lens + 1
ELSE IF ( stid .eq. 'COR' ) THEN
C
C* COR precedes the station id (WMO 11/05).
C
corflg = .true.
ibeg = ibeg + lens + 1
ELSE
wmo = .false.
END IF
ELSE IF ( lens .eq. 0 ) THEN
C
C* Leading character is a blank, so keep looking.
C
ibeg = ibeg + 1
ELSE
wmo = .false.
END IF
END IF
ELSE
found = .false.
wmo = .false.
END IF
END DO
C
C* Look for '=' as report terminator.
C
IF ( ibeg .gt. lenb ) THEN
iret = -2
RETURN
ELSE
iend1 = INDEX ( bultin ( ibeg:lenb ), '=' )
IF ( iend1 .ne. 0 ) THEN
iend = iend1 + ibeg - 2
ELSE
iend = lenb
END IF
END IF
C
C* Reset pointer in bulletin.
C
ibpnt = iend + 3
C
C* Construct report and pointers.
C
IF ( ibeg .gt. iend ) THEN
iend = ibpnt
IF ( ibeg .gt. ibpnt ) THEN
iret = -2
RETURN
END IF
END IF
report = bultin ( ibeg : iend )
CALL ST_LSTR ( report ( :iend - ibeg + 1 ), lenr, ier )
C
C* Don't decode a report containing "NIL" after station ID.
C
lenmin = MIN ( lenb, iens + 10 )
inil = INDEX ( bultin ( iens:lenmin ), 'NIL' )
IF ( inil .ne. 0 ) THEN
iret = -3
CALL DC_WLOG ( 4, 'DCMETR', 6, report(:lenr), ier)
RETURN
END IF
C
C* Was a station id found?
C
IF ( .not. found ) THEN
C
C* No station id found where expected.
C
iret = -1
ELSE
C
C* Have a four character alpha string - assume station id.
C* Initialize common variables to missing.
C
CALL MT_INIT ( mret )
C
C* Store report type.
C
IF ( rpttyp .eq. 'MT' ) THEN
rivals ( irthrp ) = 0.
ELSE IF ( rpttyp .eq. 'SP' ) THEN
rivals ( irthrp ) = 1.
END IF
END IF
C*
RETURN
END
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