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[Support #GZX-863168]: upperair decoding problem

Vu Duy Tien,

The dcuair decoder is using the date/time of the data product as a quality
control check against the current system time to decide if the bulletin is valid
(note that the decode can be configured using the "-c" option
to set the expected time other than the system time if you were decoding old
case study data).

In your log messages below, your PPAA bulletin apparently has a time in the
product as March 17, 12Z, while the current time on the computer is 1757Z
March 26. As a result, the bulletin is not stored bebause it is outside the 
range of
time allowe by the "-b 24" option to dcuair which tells the decoder
to reject data older than 24 hours. The assumption here is that it may either
be a coding error in the bulletin, or retransmission of older data. The
exact time cannpt be guessed, so the data is not allowed to corrupt the 
analysis.

If you have raw bulletins you would like me to look at, please send them along.

Steve Chiswell
Unidata User Support


> Dear every one!
> 
> I'm interesting in using LDM system to receive data over internet. Currently 
> , I'm using LDM 6.4.6 receiving upperair data from IDD.
> The LDM configuration is configured to decoding upper data in 
> /home/ldm/etc/pqact.gempak as below:
> #
> # upperair data
> #
> WMO      ^U[ABCDEFGHIJKLMNOPQRSTUVWXY]
> pipe decodeders/dcuair -b 24 -m 16
> -d /home/nadata/gempak/log/dcuair.log
> -e GEMTBL=/home/gempak/GEMPAK5.9.4/gempak/tables
> -s snstns.tbl
> /home/nadata/gempak/upperair/YYYYMMDD_upa.gem
> When LDM is running, in the log file show messages as below:
> [23348] 070326/2240 [DCUAIR 2]  INVALID DATTIM: 070327/1200    070326/1540  
> 27 12  1220 47041 TTBB 2712/ 47041
> [23348] 070326/2240 [DCUAIR 2]  INVALID DATTIM: 070327/1200    070326/1540  
> 27 12  1220 47058 TTBB 2712/ 47058
> [23348] 070327/0057 [DCUAIR 2]  INVALID DATTIM: 070317/1200    070326/1757  
> 17 12-13317 48565 PPAA 67121 48565
> [23348] 070327/0855 [DCUAIR 2]  INVALID DATTIM:                070327/0155  
> 38  0 15725 91413 TTCC 88001 91413
> [23348] 070327/1037 [DCUAIR 2]  INVALID DATTIM: 070326/0000    070327/0337  
> 26  0 -1657 41594 TTBB 76001 41594
> 
> When I list the content of the upperair, PPAA data  does not show.
> 
> What's probplem when recieving data?
> The decode upper air progam has problem?
> How to solve that problem?
> 
> I'm looking forward  your reply!
> 
> Thank in advance
> 
> Vu Duy Tien
> Researcher
> R&D division
> NCHMF
> HMS
> No 4 Dang Thai Than, Hanoi, Vietnam
> TEL: 08449333110
> 
> 
> 
> 
> ---------------------------------
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> 


Ticket Details
===================
Ticket ID: GZX-863168
Department: Support GEMPAK
Priority: Normal
Status: Closed