• A friendly and periodic reminder of the rules we use for fostering high SNR and quality conversation and interaction at Stormtrack: Forum rules

    P.S. - Nothing specific happened to prompt this message! No one is in trouble, there are no flame wars in effect, nor any inappropriate conversation ongoing. This is being posted sitewide as a casual refresher.

BREAKING NEWS: Level3 radar data to increase resolution, change format

I just posted this over at Allisonhouse:

Everyone,

We have just been informed by the National Weather Service that starting in February 2010, and lasting through April, 2010...the National Weather Service will add higher resolution Level3 radar data products, replacing quite a few of the ones you use right now. The legacy products will continue to be sent for 6 months after all of the replacement products have been added, and will be discontinued on December 1, 2010.

What it all means in a nutshell is this:

1. Resolution will increase
2. The number of reflectivity levels will increase to 256 (meaning you will need to have 256 colors in your color palette to display all the intensity levels)
3. The volume of the files will double, on average
4. The Level3 format will change
5. It will be completed by the end of March, 2010...with legacy products ending 12/1/2010.

Allisonhouse will be working closely with its software partners to provide a seamless as possible transition to the newer and better products upon receipt of transmission from the National Weather Service, and we will provide you with more information as it becomes available. Here is the official, techy NOAA announcement.

-----------------------------------------------------------------------------------

TECHNICAL IMPLEMENTATION NOTICE 09-41
NATIONAL WEATHER SERVICE HEADQUARTERS WASHINGTON DC
155 PM EDT WED NOV 25 2009

TO: SUBSCRIBERS
-FAMILY OF SERVICES /FOS/
-NOAA WEATHER WIRE SERVICE /NWWS/
-EMERGENCY MANAGERS WEATHER INFORMATION NETWORK /EMWIN/
-SATELLITE BROADCAST NETWORK /NOAAPORT/
-OTHER NATIONAL WEATHER SERVICE /NWS/ CUSTOMERS AND
PARTNERS...AND NWS EMPLOYEES

FROM: RICHARD J. VOGT
DIRECTOR...WSR-88D RADAR OPERATIONS CENTER

SUBJECT: ADDITION OF HIGHER RESOLUTION WSR-88D PRODUCTS TO
SBN/NOAAPORT AND RPCCDS: EFFECTIVE FEBRUARY 9 2010

EFFECTIVE TUESDAY FEBRUARY 9 2010...AT APPROXIMATELY 1500
COORDINATED UNIVERSAL TIME /UTC/...THE NWS WILL BEGIN
DISSEMINATING RADAR PRODUCTS LISTED IN TABLE 1 VIA THE RPCCDS
AND SBN/NOAAPORT.

NWS IS UPDATING REQUIREMENTS TO PROVIDE HIGHER RESOLUTION
VERSIONS OF EXISTING WEATHER SURVEILLANCE RADAR-1988...DOPPLER
/WSR-88D/ PRODUCTS FOR SATELLITE BROADCAST NETWORK /SBN/...
NOAAPORT AND RADAR PRODUCT CENTRAL COLLECTION DISSEMINATION
SERVICE /RPCCDS/ DISTRIBUTION.

TABLE 1: WMO HEADINGS FOR WSR-88D RADAR PRODUCT ADDITIONS

# TTUSII NNN PRODUCT DESCRIPTION DIRECTORY

1 SDUS5I N0Q BASE REFLECTIVITY 94/DR 256LVL 0.5DEG DS.P94R0
2 SDUS5I NAQ BASE REFLECTIVITY 94/DR 256LVL 0.9DEG DS.P94RA
3 SDUS2I N1Q BASE REFLECTIVITY 94/DR 256LVL 1.5DEG DS.P94R1
4 SDUS2I NBQ BASE REFLECTIVITY 94/DR 256LVL 1.8DEG DS.P94RB
5 SDUS2I N2Q BASE REFLECTIVITY 94/DR 256LVL 2.4DEG DS.P94R2
6 SDUS2I N3Q BASE REFLECTIVITY 94/DR 256LVL 3.4DEG DS.P94R3
7 SDUS5I N0U BASE VELOCITY 99/DV 256LVL 0.5DEG DS.P99V0
8 SDUS5I NAU BASE VELOCITY 99/DV 256LVL 0.9DEG DS.P99VA
9 SDUS2I N1U BASE VELOCITY 99/DV 256LVL 1.5DEG DS.P99V1
10 SDUS2I NBU BASE VELOCITY 99/DV 256LVL 1.8DEG DS.P99VB
11 SDUS2I N2U BASE VELOCITY 99/DV 256LVL 2.4DEG DS.P99V2
12 SDUS2I N3U BASE VELOCITY 99/DV 256LVL 3.4DEG DS.P99V3
13 SDUS5I DVL DIGITAL VERTICAL INTEG LIQUID 134/DVL DS.134IL
14 SDUS7I EET ENHANCED ECHO TOPS 135/EET DS.135ET

THESE ARE HIGHER RESOLUTION VERSIONS OF PRODUCTS CURRENTLY BEING
DISSEMINATED. ON THE TOC FTP SERVER...WSR-88D PRODUCTS WILL BE
PLACED IN THE PRODUCT NAMED SUBDIRECTORIES LISTED IN TABLE 1
BELOW THE FOLLOWING DIRECTORY:

FTP://TGFTP.NWS.NOAA.GOV/SL.US008001/DF.OF/DC.RADAR/

TO PROVIDE A MORE GRADUAL INCREASE IN DATA THROUGHPUT...THE NWS
WILL BEGIN CENTRAL COLLECTION OF THE LOWEST TWO ELEVATIONS IN
FEBRUARY 2010 AND THEN ADD THE REMAINDER OF THE ELEVATIONS BY
APRIL 2010. THE NWS PLANS TO STOP DISEMINATING THE LOW
RESOLUTION PRODUCTS LISTED IN TABLE 2 ON DECEMBER 1 2010.

TABLE 2: WMO HEADINGS FOR DISCONTINUED WSR-88D RADAR PRODUCTS

# TTUSII NNN PRODUCT DESCRIPTION DIRECTORY
1 SDUS5I N0R BASE REFLECTIVITY 19/R 16LVL 0.5DEG DS.P19R0
2 SDUS2I N1R BASE REFLECTIVITY 19/R 16LVL 1.5DEG DS.P19R1
3 SDUS2I N2R BASE REFLECTIVITY 19/R 16LVL 2.4DEG DS.P19R2
4 SDUS3I N3R BASE REFLECTIVITY 19/R 16LVL 3.4DEG DS.P19R3
5 SDUS7I N0Z BASE REFLECTIVITY 20/R 16LVL 0.5DEG DS.P20-R
6 SDUS6I N0W BASE VELOCITY 25/V 16LVL 0.5DEG DS.P25-V
7 SDUS5I N0V BASE VELOCITY 27/V 16LVL 0.5DEG DS.P27V0
8 SDUS7I N1V BASE VELOCITY 27/V 16LVL 1.5DEG DS.P27V1
9 SDUS6I N2V BASE VELOCITY 27/V 16LVL 2.4DEG DS.P27V2
10 SDUS6I N3V BASE VELOCITY 27/V 16LVL 3.4DEG DS.P27V3

WHEN FULLY IMPLEMENTED...THE NOAAPORT AND RPCCDS COMMUNICATIONS
THROUGHPUT OF WSR-88D PRODUCTS WILL DOUBLE. FOR EACH RADAR...
THE AVERAGE HOURLY PRODUCT VOLUME VIA RPCCDS WILL BE
APPROXIMATELY 5.2 MEGABYTES /MB/ AND THE AVERAGE DAILY VOLUME
WILL BE 124.2 MB. WHEN FULLY IMPLEMENTED...THE AVERAGE DAILY
VOLUME FOR ALL 155 WSR-88D RADARS WILL BE 20 GIGABYTES /GB/.
WORST CASE HOURLY THROUGHPUT IS ESTIMATED TO REACH 19 MB FOR A
SINGLE RADAR AND 1.5 GB FOR ALL 155 RADARS. ON NOAAPORT...
PRODUCTS ARE FURTHER COMPRESSED AND THEREFORE THROUGHPUT WILL BE
REDUCED SOMEWHAT.

NWS HAS ESTABLISHED THE FOLLOWING WEB SITE TO PROVIDE PROJECT
PLANS AND STATUS...ADDITIONAL INFORMATION AND TO PREVIEW
SAMPLE PRODUCTS:

http://www.roc.noaa.gov/WSR88D/LEVEL_III/LEVEL3INFO.ASPX
THE REFERENCED MATERIALS WILL BE INITIALLY AVAILABLE AT:

FTP://FTP.ROC.NOAA.GOV/PUB/HIGHERRESPRODUCTS

UNTIL THEY CAN BE LOADED ON THE ROC WEB SITE.

THE FORMATS FOR THE ADDED PRODUCTS ARE DESCRIBED IN THE
INTERFACE CONTROL DOCUMENT FOR RPG TO CLASS 1 USER - BUILD
11.0...AVAILABLE AT:

HTTP://WWW.ROC.NOAA.GOV/WSR88D/PROGRAM/ICDS.ASPX

IF YOU HAVE QUESTIONS OR COMMENTS...PLEASE CONTACT:

TIM CRUM
WSR-88D RADAR OPERATIONS CENTER
1200 WESTHEIMER DRIVE
NORMAN...OK 73069
[email protected]
OR

MIKE ISTOK
NWS...OFFICE OF SCIENCE AND TECHNOLOGY
SILVER SPRING...MARYLAND
[email protected]

IF YOU HAVE QUESTIONS ABOUT THE NOAAPORT ACTIVATION OR DATA FLOW
OF THESE PRODUCTS...PLEASE CONTACT:

BRIAN GOCKEL
NWS...OFFICE OF SCIENCE AND TECHNOLOGY
SILVER SPRING...MARYLAND
[email protected]

THE CENTRALLY COLLECTED WSR-88D PRODUCTS WILL BE ARCHIVED AT THE
NATIONAL CLIMATIC DATA CENTER /NCDC/ AND WILL BE AVAILABLE FOR
DOWNLOAD FROM:

HTTP://HURRICANE.NCDC.NOAA.GOV/PLS/PLHAS/HAS.DSSELECT

NATIONAL OTHER TECHNICAL IMPLEMENTATION NOTICES ARE ONLINE AT
/USE LOWERCASE/:

HTTP://WWW.WEATHER.GOV/OS/NOTIF.HTM

$$
NNNN
 
Last edited by a moderator:
All radar software will have to update, otherwise they'll stop displaying any data when the legacy products stop.
 
I think I like this, but it will certainly put a strain on mobile data connections... As it is, most chasers, anecdotally, use GR3 since the file sizes are smaller given limited throughput on many cell data networks. A doubling of the file size will be nice in those areas with full broadband-ish network speeds, or when one is armchair chasing or on a wifi network, but it'll make things quite a bit more difficult in rural areas. Chaser convergence already is leading to some data congestion problems, so I imagine that many chasers now pulling down ~2x the data will only make matters worse in this regard.

Of course, the NWS doesn't make radar data dissemination decisions based on what's most convenient for chasers, and I look forward to the additional data when I'm on a relatively fast and reliable connection.
 
I'll have to read this thread in April-May next year and see how you're all being affected ;)
 
yes. GR will be updated. Gil and I are in contact with Mike when anything like this happens.

Tyler, any recent word from Gibson Ridge on this? February fast approaches ;) Will GR update be waiting until all the products have been successfully rolled out (April-ish)? -Just curious.
 
Back
Top