Support NEXRAD Level III Super-Res

[akrherz]

As of this week, "super-res" level III products are now flowing over NWS dissemination systems like NOAAPort. This issue summaries work done to support these products in GEMPAK. There are two relevant PNS/SCNs at play here:

• PNS 21-55 Soliciting Comments on a Change to NEXRAD Product Dissemination via NOAAPORT/SBN on December 1, 2021
• SCN 21-96 Change to NEXRAD Product Dissemination via NOAAPort/SBNon or Around February 2, 2022

My understanding is that NCEP NAWIPS will not support these products as they are considered enhancements and national centers they support continue to migrate to AWIPS 2. Having said that, never say never, but the GEMPAK community should try to see what can be done prior to anything "coming from on high".

So the pressing issue at hand here is if/when some of the pre-super-res products that are heavily used, like N0Q are removed from noaaport. The expectation is that these products would still remain on other non-push dissemination systems, but the Unidata community is heavily tied to NOAAPort. My understanding at the moment is that the products slated to be removed have not yet, due to various NWS national centers yet to migrate off noaaport for level III reception.

Table 1 RADAR PRODUCTS TO BE REMOVED FROM NOAAPORT/SBN

WMO HEADING	PRODUCT	DESCRIPTION
NXUS6i	GSM	General Status Message 2/GSM
SDUS7i	NET	Echo Tops 4km X 4km 41/ET
SDUS2i	N1S	Storm Relative Velocity .54nm X 1deg 16LVL 56/SRM 1.3-1.5DEG
SDUS2i	N2S	Storm Relative Velocity .54nm X 1deg 16LVL 56/SRM 2.4-2.5DEG
SDUS3i	N3S	Storm Relative Velocity .54nm X 1deg 16LVL 56/SRM 3.1-3.5DEG
SDUS4i	RCM	Radar Coded Message 74/RCM
SDUS4i	RSL	Archive III Status Product 152/ASP
SDUS8i	DOD	Dig. One Hour Difference Accumulation 174/DOD
SDUS8i	DSD	Dig. Storm Total Difference Accumulation 175/DSD
SDUS5i	NXQ	Base Reflectivity .54nm X 1deg 256LVL 94/DR -0.2DEG
SDUS5i	NYQ	Base Reflectivity .54nm X 1deg 256LVL 94/DR 0.0-0.2DEG
SDUS5i	NZQ	Base Reflectivity .54nm X 1deg 256LVL 94/DR 0.3-0.4DEG
SDUS5i	N0Q	Base Reflectivity .54nm X 1deg 256LVL 94/DR 0.5DEG
SDUS5i	NAQ	Base Reflectivity .54nm X 1deg 256LVL 94/DR 0.9DEG
SDUS2i	N1Q	Base Reflectivity .54nm X 1deg 256LVL 94/DR 1.3-1.5DEG
SDUS2i	NBQ	Base Reflectivity .54nm X 1deg 256LVL 94/DR 1.8DEG
SDUS2i	N2Q	Base Reflectivity .54nm X 1deg 256LVL 94/DR 2.4-2.5DEG
SDUS2i	N3Q	Base Reflectivity .54nm X 1deg 256LVL 94/DR 3.1-3.5DEG
SDUS5i	NXU	Base Velocity .13nm X 1deg 256LVL 99/DV -0.2DEG
SDUS5i	NYU	Base Velocity .13nm X 1deg 256LVL 99/DV 0.0-0.2DEG
SDUS5i	NZU	Base Velocity .13nm X 1deg 256LVL 99/DV 0.3-0.4DEG
SDUS5i	N0U	Base Velocity .13nm X 1deg 256LVL 99/DV 0.5DEG
SDUS5i	NAU	Base Velocity .13nm X 1deg 256LVL 99/DV 0.9DEG
SDUS2i	N1U	Base Velocity .13nm X 1deg 256LVL 99/DV 1.3-1.5DEG

Table 2 RADAR PRODUCTS TO BE ADDED TO NOAAPORT/SBN

WMO HEADING	PRODUCT	DESCRIPTION
SDUS5i	NXB	Base Reflectivity .13nm X .5deg 256LVL 153/SDR -0.2DEG
SDUS5i	NYB	Base Reflectivity .13nm X .5deg 256LVL 153/SDR 0.0-0.2DEG
SDUS5i	NZB	Base Reflectivity .13nm X .5deg 256LVL 153/SDR 0.3-0.4DEG
SDUS5i	N0B	Base Reflectivity .13nm X .5deg 256LVL 153/SDR 0.5DEG
SDUS5i	NAB	Base Reflectivity .13nm X .5deg 256LVL 153/SDR 0.9DEG
SDUS2i	N1B	Base Reflectivity .13nm X .5deg 256LVL 153/SDR 1.3-1.5DEG
SDUS2i	NBB	Base Reflectivity .13nm X 1deg 256LVL 153/SDR 1.8DEG
SDUS2i	N2B	Base Reflectivity .13nm X 1deg 256LVL 153/SDR 2.4-2.5DEG
SDUS2i	N3B	Base Reflectivity .13nm X 1deg 256LVL 153/SDR 3.1-3.5DEG
SDUS5i	NXG	Base Velocity .13nm X .5deg 256LVL 154/SDV -0.2DEG
SDUS5i	NYG	Base Velocity .13nm X .5deg 256LVL 154/SDV 0.0-0.2DEG
SDUS5i	NZG	Base Velocity .13nm X .5deg 256LVL 154/SDV 0.3-0.4DEG
SDUS5i	N0G	Base Velocity .13nm X .5deg 256LVL 154/SDV 0.5DEG
SDUS5i	NAG	Base Velocity .13nm X .5deg 256LVL 154/SDV 0.9DEG
SDUS2i	N1G	Base Velocity .13nm X .5deg 256LVL 154/SDV 1.3-1.5DEG

Hopefully we, the GEMPAK Community, can get this resolved quickly :)

[akrherz]

OK, initial attempt to load N0B in nmap2. GUI allows selection of the N0B source, but then emits error messages of whilst attempting to load each file.

got a non-zero tbnids value 153 3

1. Added an entry in gempak/tables/sat/imgtyp.tbl, same error.
2. Added entry in gempak/tables/rad/nidprd.tbl, and it loads.

This is hopeful.

[akrherz]

Now trying N0G in nmap2 and get a similar error message

got a non-zero tbnids value 154 3

Similar to the above, adding table entries allows this to load. Hope springs eternal that this all may work without modifying code.

[akrherz]

nex2img appears up to the task of creating a N0B composite.

[sebenste]

One user I know would love to have this capability. If NCEP will not support it, and you have it working, would you consider making a 7.14.1 upgrade for this capability? Furthermore, it looks like velocity data should work with table updates as well.

And maybe NCEP would reconsider if we provided the code...?

Also, tilts below .5 and up to 1.5 are super-res now. We should have entries for those.

[akrherz]

@sebenste yes, I plan on making a release once #73 is merged. In general, it is just some table updates.

[akrherz]

PR #73 merged, but am leaving this open for a bit more testing / review before declaring victory / making a GEMPAK patch release.