Glo 30 filling

[cmarshak]

Resolves #67. Simply updates dem-stitcher to 2.3.0 (see this PR), which, by default, resolves the filling for glo_30 dem.

[cmarshak]

The build will fail until the linked to pull request is released on PyPI.

[cmarshak]

An example over the problematic area is investigated.

Here is a link to the SLCs on ASF DAAC.

The command to generate a GUNW from the above SLCs is:

isce2_topsapp --reference-scenes S1A_IW_SLC__1SDV_20220625T145353_20220625T145420_043821_053B41_AE0E --secondary-scenes S1A_IW_SLC__1SDV_20220613T145352_20220613T145419_043646_0535FB_8B9A > topsapp_img.out 2> topsapp_img.err

Products for inspection:

• The output GUNW
• Low resolution DEM and its xml used for geocoding (isce gdal format)
• Browse image below

Lots of fringes, but likely reasonable due to topography.

[cmarshak]

Relevant dem-stitcher will be 2.3.0 per ACCESS-Cloud-Based-InSAR/dem-stitcher#45.

[cmarshak]

I have updated the environment.yml file to obtain dem-stitcher 2.3.0 from conda-forge. Assuming it passes, we can merge after @sssangha approves the pull request (I have enabled autom-merge).

[sssangha]

LGTM!