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20040407: Question

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  • Subject: 20040407: Question
  • Date: Wed, 07 Apr 2004 15:58:57 -0600
Yoong-Goog,

The dcnexr2 program is just un-bzipping the pieces of the
radar file that are sent and appending them to the output file.
It is not doing any decoding of the data. The GEMPAK library
is utilizing the RSL library to read the data in the plotting programs.

The resultant output file is the ARCHIVE2.0 format documented
in the Interface Control Document for ArchiveII/User available from:
http://www.roc.noaa.gov/ssb/cm/icd_downloads.asp

In the long run, it would be better to develop applications to read the data
directly from the bzipped format to eliminate the step of un-bzipping
on receipt of the data. This would be better for disk space to
allow users to store more data online.

Steve Chiswell
Unidata User Support




>From: ygcho <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200404072047.i37KlTCT020742

>Hi Steve,
>
>I am Yoong-Goog Cho at CSU.
>First of all, I would like to express my deep sense of gratitude for your 
>help.
>
>We are interested in converting the received NEXRAD Level 2 data to another  
>data file to use our own display program that has been used for showing the 
>CSU-CHILL radar. As you know, we are currently using the DCNEXR2 decoder 
>developed by Unidata. Questions are as follows.
>
>Q1) Can we get the information regarding the file format created by the 
>decoder DCNEXR2?
>
>Q2) To make the data file with our own format, I think there are two options 
>in ways.
>One is to develop our own decoder based on BZIP2. Another option is to convert
>  
>the existing data file that is created by DCNEXR2 into the new format file. 
>Which way do you want recommend?
>
>I will be waiting for your reply.
>Thanks.
>
>Regards,
>
>Yoong-Goog
>
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