I believe the first value is the size of the packet. The second number is
the sequence number from the radar I think.
On Wed, Aug 14, 2019 at 7:10 PM Kevin W. Thomas <kwthomas@xxxxxxxxxxxxxxxxxx>
wrote:
> Evan...
>
> NEXRAD2 data arrives in a modified BZIP2 format. If I recall correctly,
> it is in groups of 100 radials that are compressed though the number may
> have changed over the years.
>
> There is just too much data to send not compressed, and this was well
> before dual pol.
>
> I did some benchmark tests *many* years ago. Back then, space saving was
> on
> the order of 85%, though this was probably without much precip.
>
> Sites may or may not decompress the data before writing. CAPS writes it
> compressed, as our ARPS software decompresses it on the fly.
>
> To answer your question, one number is probably the compressed size and
> the other thd decompressed size.
>
> Kevin W. Thomas
> Center for Analysis and Prediction of Storms
> University of Oklahoma
> Norman, Oklahoma
> Email: kwthomas@xxxxxx
>
> >ldm@dallas-tx-1:~$ ldmadmin watch 2>&1 | grep NEXRAD2
> >20190814T194054.858618Z pqutil[30750]
> >pqutil.c:display_watch() INFO 79987 20190814184136.177460 NEXRAD2
> >591026 L2-BZIP2/KCXX/20190814183810/591/26/I/V06/0
> >
> >In the above output, what is the significance of 79987 and 591026. Is one
> >the file size, or both together comprise the filesize? Offset? I would
> >appreciate any insight here.
>
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