Which ROMS source version to use for the 4DVar tutorial

[stef]

I had trouble running the first exercise in the 4DVar tutorial. I checked out

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svn checkout --username joe_roms https://www.myroms.org/svn/src/test my_test

as described in [1]. I checked out revision 974 as described in [2]. But they seem to be incompatible, the files in the project directories do not seem to fit the revision of the source tree. I had to copy the 'varinfo.dat' and 'wc13.h' from the tree of 974 and move it to the appropriate 'my_test' project directory. In particular, the varinfo.dat in

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my_test/External/varinfo.dat

does not contain

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'obs_variance'                                     ! Input
  'observation global variance'
  'squared state variable units'                   ! [squared state units]
  'nulvar'
  'datum'
  'idOvar'
  'nulvar'
  1.0d0

which is needed in obs_initial.f90. I guess this is because I changed the cpp directive in

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build_bash.sh

from I4DVAR to IS4DVAR and used the source trees

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wc13.h

instead of the one contained in the project directory. It did not work if I used the unmodified build_bash.sh.

After making these changes the first example runs fine.

My question: which revision do I have to check out to be compatible with the tutorial project folders? I checked out

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git checkout 5101827580c40d58b087

where

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#     commit 5101827580c40d58b0877f620b1878ea41838e6e
#     Author: Hernan G. Arango <arango@marine.rutgers.edu>
#     Date:   Thu Jul 25 11:53:23 2019 -0400
#         src:ticket:820

which is the same as ticket:821 apart from version numbering. Am I doing something wrong with the checkout?

Thanks for your help!



[1] https://www.myroms.org/wiki/4DVar_Tutorial_Introduction
[2] viewtopic.php?t=5266

[arango]

Your best strategy is to start with the latest version of the code. I think that I updated the documentation Readme and PDF files in the test repository. Maybe we need to update some of the files in WikiROMS. Nowadays, we use I4DVAR and RBL4DVAR. Our preferred method is to use the dual formulation RBL4D-Var.

Good luck

[stef]

Your best strategy is to start with the latest version of the code.

I see! Thanks!

[stef]

I confirm that the first excercise ran without error, with the wc13.h and varinfo.dat provided in the test repository, and the latest src version

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commit 3b74341007c1b2312f091fed3758655d8f2e485f (HEAD -> master, origin/master, origin/HEAD)
Author: Hernan G. Arango <arango@marine.rutgers.edu>
Date:   Sun Jan 30 19:11:43 2022 -0500

    src:ticket:907

In hindsight I should have noticed that the wc13.h in the test repository had a line:

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svn $Id: wc13.h 1100 2022-01-06 21:19:26Z arango $

I did not think you would update this to run with the latest version. Thanks again!