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20010814: Gempak METAR decoder

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: 20010814: Gempak METAR decoder
  • Date: Tue, 14 Aug 2001 12:43:29 -0600
Chip,

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GEMPAK related questions etc to address@hidden.

The decoder does rely on the control characters in the data stream
(either FOS or AFOS separators). So, pasting from a terminal won't work.
The standard pattern of a metar bulletin is:
ctrl-A \r \r \n
seq_no \r \r \n
SAUS80 KWBC DDHHMM
etc.

\r \r \n ctrl-C

You can find a sample of the data for various streams on the
Florida St. web pages: http://www.met.fsu.edu/Data/archive/

Also, you listed your affiliation in the registration as AMS.
You can select "not listed" from the registration page
(http://my.unidata.ucar.edu/registration/) and then be prompted for
entering your station information if you desire to be listed that way in
our records.

Steve Chiswell
Unidata User Support


On Tue, 14 Aug 2001, Chip Barrere wrote:

> Hi Steve,
>
> I'm not sure how to post to the discussion board, so I have directed this 
> question to you. I apologize for any inconvenience.
>
> I have set up Gempak 5.6.d on a Linux box. I currently have no active data 
> feed, so I assume that LDM is not needed. Is it possible to have dcmetr 
> decode METARs in WMO format cut and pasted into a text file? Are there 
> special control characters needed in the file for proper decoding? I have 
> tried many different ways with no luck. I receive a message that no bulletins 
> were decoded. Any help would be most appreciated. Thanks!
>
> Chip Barrere
> Meteorologist
> WVUE TV Fox 8
> New Orleans
>
>