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20030226: GEMPAK

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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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: 20030226: GEMPAK
  • Date: Thu, 27 Feb 2003 12:51:42 -0700
>From: "Bill Tabor" <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200302270428.h1R4SWt15257

>Hi,
>
>I was wondering what the data feed options are for GEMPAK.  Does it have to ru
> n with NOAAPORT or can it access data
>online off the internet, or via FTP?
>
>Thanks,
>
>Bill
>

Bill,
It depends on the format of the data that you find. For most data
(grib, nexrad, satellite etc) it doesn't make a difference. For 
surface and upperair observations, in order to decode, the GEMPAK decoders
will be expecting to find the FOS or AFOS sequences in the data
in order to obtain a complete bulletin. If your source has stripped
those characters out, you'd have to recreate them (see the GEMPAK support 
archives
for discussion on decoding data from other sources by adding the ZCZC...NNNN
or FOS sequences).

Steve Chiswell