Support for AOI's with Missing Copernicus Tiles

[AndrewPlayer3]

Problem

$PROC_HOME/DEM/mosaicDEM demrscparams 5 4
At line 43 of file mosaicDEM.f90 (unit = 1, file = 'demrscparams')
Fortran runtime error: Sequential READ or WRITE not allowed after EOF marker, possibly use REWIND or BACKSPACE

Cause

This is due to the demrscparams file not having the expected (5 * 4) number of DEM files. It has 12, rather than 20 DEM files, as most of the AOI is over the ocean - Copernicus doesn't store tiles that are only over the ocean.

docker run  --rm -it \
    -v ~/.netrc:/home/conda/.netrc
    back-projection:latest ++process back_projection \
    S1A_IW_RAW__0SDV_20240101T020749_20240101T020822_051907_064575_F71B-RAW

Solution

Support for areas without Copernicus coverage needs to be added. This would be accomplished most simply by creating mock DEMs with all 0's and the correct metadata. The source for the tiles will need to fit into cop_dem.py.