Support Level III Super Res

[akrherz]

refs #72
obsoletes #71

Pull request that implements code/table changes necessary to support NEXRAD Level III super res. Thanks to @pjpokran for getting this PR off to an excellent start!

[akrherz]

@pjpokran I found your added upc_n0q.tbl to be identical to the already bundled upc_ref2.tbl. With ac07fcd, I consolidated this back down. Is there a reason this was added that I am unaware of?

[pjpokran]

@akrherz I didn't realize that table was there. My radar composites are running with an older version of GEMPAK that didn't have that upc_ref2.tbl. If it's identical, that's fine. But you'll have to update the line in gempak/tables/sat/imgtyp.tbl as well, since it's using my file name.

[akrherz]

I think I am done tweaking for now, anybody wish to review this? @mzuranski @pjpokran ?

[mzuranski]

I'm following along with these changes, trying to adjust my 7.5.1 install, but I'm still seeing IMCBAR frequency ignored. This image was made with IMCBAR = 31/V/CR/.98;.5/.84;.02/-10 The only other difference I can think of is I'm running Ubuntu but I don't see how that could be related. Can others verify if IMCBAR frequency works for them or not on 7.14?

[akrherz]

I get the same thing, nevermind my comment about frequency. I am looking into this more.

[akrherz]

Ah, gempak/source/gemlib/im/imcbar.f has special codes to handle this. Testing a patch now....

[akrherz]

Getting close 🙃

[akrherz]

• Good: N0B, N0G nicely displays now in nmap2 gpmap
• Bad: N0Q does not display nicely :( I fouled up more tables with the NCEP 7.14.0 merge. bad daryl!

[pjpokran]

Daryl, this all looks good to me. I haven't tested any of your other changes since I'm not using other angles, but on paper they all look good. Thanks for all the additional work on this!

[akrherz]

So, of concern now is that GEMPAK seems to think N0Q starts at -32 dbz and N0B at -33 dbz. Similar off by one knot with N0U and N0G, I've hacked around that now.

[akrherz]

I'm done tinkering with this PR and will follow up with others as I find things to fix :/

[sebenste]

Just curious, what command syntax did you use to make that national mosaic?

[akrherz]

Just curious, what command syntax did you use to make that national mosaic?

Just nex2img

[pjpokran]

Gilbert - I'm writing up an email to another explaining how I do the mosiacs - when I'm done I can forward that and the script/etc to you.

[sebenste]

Great, thanks!

[akrherz]

I don't know of further feedback coming on this and can easily followup with issues folks find with any testing that comes. I have some more cosmetic things to tweak overtop this PR, so want to get it in now to keep merge nightmares limited.

[mzuranski]

@akrherz Since this is going to get closed out soon, how would you feel if I opened a new issue for imcbar frequency?

The 7.5.1 documentation states:

Frequency describes the levels to be labeled. If the frequency is
positive, the labels are plotted on the right/top of the color bar.
If it is negative, the labels are plotted on the left/bottom of the
color bar. The default is -1.

...and that's it.

Granted those docs are now obsolete, they're still the best we've got (as far as I'm aware). While I'm not expecting a change to the behavior anytime soon, I would at least like it noted someplace that the frequency value is ignored for certain products as to avoid confusion.

I'll also close out #15 as it's old and probably related to this anyway.

[akrherz]

how would you feel if I opened a new issue for imcbar frequency?

Yes please, I was going to do the same, but it slipped my mind yesterday.