gdas_init utility bug fix

[GeorgeGayno-NOAA]

DESCRIPTION OF CHANGES:

When using warm restart files as input to the chgres step (v15/GDAS and v16 retro/GDAS options), it would fail because it was reading from the wrong input data orography directory. Update the scripts to point to the correct directory.

TESTS CONDUCTED:

Two test cases were done on Hera, Jet and WCOSS2.

• Test 1

  • 2020/12/20/12z cycle
  • CDUMP=GDAS
  • use_v16retro=no

• Test 2

  • 2019/12/20/12
  • CDUMP=GDAS
  • use_v16retro=yes

Both tests completed normally and produce the required coldstart files.

The 's4' scripts were tested by @DavidHuber-NOAA.

DOCUMENTATION:

N/A

ISSUE:

Fixes #908.

[GeorgeGayno-NOAA]

@CoryMartin-NOAA tested the branch on the case that was failing for him. It worked.

[KateFriedman-NOAA]

Looks good! Thanks @GeorgeGayno-NOAA !

[DavidHuber-NOAA]

I gave this a try out on Jet and was able to create ICs. Everything looks good. Thanks!

[GeorgeGayno-NOAA]

I gave this a try out on Jet and was able to create ICs. Everything looks good. Thanks!

Thanks, can you also try on 's4'? I don't have access to that machine.

[DavidHuber-NOAA]

Sure, I'll let you know how that goes.

[DavidHuber-NOAA]

Looks good, thanks!