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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
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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. > > _______________________________________________ > NOTE: All exchanges posted to Unidata maintained email lists are > recorded in the Unidata inquiry tracking system and made publicly > available through the web. Users who post to any of the lists we > maintain are reminded to remove any personal information that they > do not want to be made public. > > > ldm-users mailing list > ldm-users@xxxxxxxxxxxxxxxx > For list information or to unsubscribe, visit: > https://www.unidata.ucar.edu/mailing_lists/ > -- “The presence of those seeking the truth is infinitely to be preferred to the presence of those who think they’ve found it." -- Terry Prachett ------------------------------------------- Karen.Cooper@xxxxxxxx Phone#: 405-325-6456 Cell: 405-834-8559 National Severe Storms Laboratory
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