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[McIDAS #VAH-623608]: Missing ADDE radar



Hi Russ,

re:
> Finally got service back. turned to be a problem with the SSEC
> firewall. MANY people lost data this weekend .

Was it some sort of Friday afternoon tweak that went bad?

re:
> I don't remember if I aked you this Question....
> Is the Unidata national composite contained in the LDM feed?

Yes, it is available in the FNEXRAD feed.

The easiest way to find out what is in a particular IDD datastream
is through the LDM 'notifyme' utility.  Here is an example:

<as 'ldm'>
notifyme -vl- -f ANY -h your_upstream_feed_host

This invocation of 'notifyme' asks 'your_upstream_feed_host' what
data it is receiving from all datastreams.  If you want to check
what it is receiving in the FNEXRAD feed, the invocation would be:

notifyme -vl- -f FNEXRAD -h your_upstream_feed_host

Similarly, you can use 'notifyme' to ask your local machine what
it is receiving in any/all datastreams.  Here is an example
invocation asking your local LDM to list what it has received
in the FNEXRAD feed in the past 3600 seconds:

notifyme -vl- -f FNEXRAD -o 3600

The following is some example output from 'notifyme' for FNEXRAD
products received on the local host in the past 3600 seconds:

<as 'ldm'>
notifyme -vl- -f FNEXRAD -o 3600
Jun 15 14:40:59 notifyme[26562] NOTE: Starting Up: localhost: 
20090615134059.332 TS_ENDT {{FNEXRAD,  ".*"}}
Jun 15 14:40:59 notifyme[26562] NOTE: LDM-5 desired product-class: 
20090615134059.332 TS_ENDT {{FNEXRAD,  ".*"}}
Jun 15 14:40:59 notifyme[26562] INFO: Resolving localhost to 127.0.0.1 took 
0.000462 seconds
Jun 15 14:40:59 notifyme[26562] NOTE: NOTIFYME(localhost): OK
Jun 15 14:41:00 notifyme[26562] INFO:  1198469 20090615142800.444 FNEXRAD 000  
rad/NEXRCOMP/1km/n0r_20090615_1425
Jun 15 14:41:00 notifyme[26562] INFO:  2778541 20090615142808.578 FNEXRAD 000  
radar_mosaic_nathr !grib2/unidata/UPC_255/#000/200906151425F000/N0R/0 - NONE! 
000000
Jun 15 14:41:00 notifyme[26562] INFO:    92584 20090615143000.795 FNEXRAD 000  
rad/NEXRCOMP/4km/ntp_20090615_1428
Jun 15 14:41:00 notifyme[26562] INFO:  1191027 20090615143100.961 FNEXRAD 000  
rad/NEXRCOMP/1km/n0r_20090615_1429
Jun 15 14:41:00 notifyme[26562] INFO:    89630 20090615143106.983 FNEXRAD 000  
rad/NEXRCOMP/2km/n1p_20090615_1429
Jun 15 14:41:00 notifyme[26562] INFO:  2777099 20090615143207.644 FNEXRAD 000  
radar_mosaic_nathr !grib2/unidata/UPC_255/#000/200906151431F000/N0R/0 - NONE! 
000000
Jun 15 14:41:00 notifyme[26562] INFO:  1175073 20090615143400.504 FNEXRAD 000  
rad/NEXRCOMP/1km/n0r_20090615_1432
Jun 15 14:41:00 notifyme[26562] INFO:    92440 20090615143500.694 FNEXRAD 000  
rad/NEXRCOMP/4km/ntp_20090615_1433
 ...

The product you are interested in, the 1km national composite, has headers that
look like:

rad/NEXRCOMP/1km/n0r_20090615_1425
rad/NEXRCOMP/1km/n0r_20090615_1432
 ...

You can use 'notifyme' to list out products whose product IDs match a
specific pattern.  Here is an example that lists all of the 1km national
reflectivity composites for the past hour (3600 seconds):

notifyme -vl- -f FNEXRAD -o 3600 -p rad/NEXRCOMP/1km/n0r
Jun 15 14:44:22 notifyme[28312] NOTE: Starting Up: localhost: 
20090615134422.561 TS_ENDT {{FNEXRAD,  "rad/NEXRCOMP/1km/n0r"}}
Jun 15 14:44:22 notifyme[28312] NOTE: LDM-5 desired product-class: 
20090615134422.561 TS_ENDT {{FNEXRAD,  "rad/NEXRCOMP/1km/n0r"}}
Jun 15 14:44:22 notifyme[28312] INFO: Resolving localhost to 127.0.0.1 took 
0.00042 seconds
Jun 15 14:44:22 notifyme[28312] NOTE: NOTIFYME(localhost): OK
Jun 15 14:44:23 notifyme[28312] INFO:  1175073 20090615143400.504 FNEXRAD 000  
rad/NEXRCOMP/1km/n0r_20090615_1432
Jun 15 14:44:23 notifyme[28312] INFO:  1189662 20090615143800.242 FNEXRAD 000  
rad/NEXRCOMP/1km/n0r_20090615_1435
Jun 15 14:44:23 notifyme[28312] INFO:  1189428 20090615144100.764 FNEXRAD 000  
rad/NEXRCOMP/1km/n0r_20090615_1439
^CJun 15 14:44:25 notifyme[28312] NOTE: exiting

Notes:

- all of the image products in the FNEXRAD datastream are Zlib compressed;
  they can be uncompressed by the ldm-mcidas utility 'zlibg2gini'

- after uncompression, the 1km national base reflectivity composites
  are about 14 MB in size

- Unidata McIDAS can use the compressed images from the NIMAGE (NOAAPort
  GOES sectors), FNEXRAD (Unidata created composites) and UNIWISC
  (GOES-East/West image sectors) feeds _without_ uncompressing them.
  GEMPAK can do the same.

Cheers,

Tom
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Ticket Details
===================
Ticket ID: VAH-623608
Department: Support McIDAS
Priority: Normal
Status: Closed


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