ASCAT mask maker input utility program

[amfox37]

This program reads in a NetCDF file containing ASCAT soil moisture masks available from:
Lindorfer, R., Wagner, W., Hahn, S., Kim, H., Vreugdenhil, M., Gruber, A., Fischer, M., & Trnka, M. (2023).
Global Scale Maps of Subsurface Scattering Signals Impacting ASCAT Soil Moisture Retrievals (1.0.0) [Data set].
TU Wien. https://doi.org/10.48436/9a2y9-e5z14

It provides the possibility to combine different masks (current default case is combination of subsurface and wetland masks) and interpolates onto a regular grid with a (hardwired) 0.1 degree lat/lon resolution and -90/-180 degree lower left corner used for quick indexing in the ASCAT observation reader QC routine, writing the final output to a NetCDF file.

[gmao-rreichle]

@amfox37 : Thanks for the latest changes. I added one more commit. Please take a look and let me know if the changes are ok with you.

[gmao-rreichle]

@amfox37 : I implemented the path/filename changes in this commit. Please review, test the new functionality from scratch (new build) to make sure that ascat_mask_maker.x still works as intended, and then let me know. Once I have your confirmation, I'll go ahead and merge.
Also, I made a copy of the Lindorfer et al file into a new sub-dir "./Mask", so please remove: /discover/nobackup/projects/gmao/smap/SMAP_Nature/ASCAT_EUMETSAT/subsurface_scattering_ASCAT_ERA5_Land.nc

[amfox37]

@weiyuan-jiang @gmao-rreichle My update to the CMakeLists works OK and builds but doesn't install, but I don't know if addingesma_add_subdirectories(util/inputs/ASCAT_sm_mask) is the correct thing to do?

[amfox37]

File removed.
Everything seems to be working as expected with a clean build - although I'm afraid I don't know if adding esma_add_subdirectories(util/inputs/ASCAT_sm_mask) is actually the correct thing to do? Or are you supposed to add a file to each subdirectory and only add one level at a time? Otherwise good to go I think

[gmao-rreichle]

File removed. Everything seems to be working as expected with a clean build - although I'm afraid I don't know if adding esma_add_subdirectories(util/inputs/ASCAT_sm_mask) is actually the correct thing to do? Or are you supposed to add a file to each subdirectory and only add one level at a time? Otherwise good to go I think

Thanks, @amfox37. I think @weiyuan-jiang gave his ok on the single CMakeLists.txt file here: "If there is no other fortran files, we dont need to add all the CMakeLists.txt" (note that the formatting in the original comment was a bit messed up).
I will go ahead and ask for official CMake approval.

[gmao-rreichle]

@mathomp4, @weiyuan-jiang: FYI, I was able to merge this GEOSldas PR without formal CMake approval. Because @weiyuan-jiang had already looked at it, I went for it and merged.