Re: Now Level II NEXRAD data files are bogus??

• To: ldm-users@xxxxxxxxxxxxxxxx, poker@xxxxxxxxxxxxxxx,
• Subject: Re: Now Level II NEXRAD data files are bogus??
• From: "Kevin W. Thomas" <kwthomas@xxxxxxxxxxxxxxxxxx>
• Date: Thu, 13 Jun 2002 16:07:50 -0500 (CDT)

>I'm receiving corrupted NEXRAD Level II files.
>
>I have my own indexing software which works on NEXRAD data files, whether they
>are LDM, tape, or live/RIDDS.  Up until today, it has always worked fine.
>Today, it core dumps on some 88D files.
>
>Due to a design flaw in BZIP2 format, there is no way of knowing the length
>of data when it is uncompressed without uncompressing it.  As a result, the
>format for LDM has segments that have an encoded length in it followed by
>data.  This pattern repeats until the end of the file.  This normally up to a
>5 digit number.  Today, I'm seeing 10 digit lengths at the corruption point.
>Something is making a mess of the data.

As the saying goes "never mind".  It looks like we had a data "glitch" on
one system.  Another seems to be clean.

        Kevin W. Thomas
        Center for Analysis and Prediction of Storms
        University of Oklahoma
        Norman, Oklahoma
        Email:  kwthomas@xxxxxx