Add astro/montage_skypatch.py to create large sky model for oskar
Add astro/montage_skypatch.py to create large sky model for oskar

liweitianux/atoolbox,liweitianux/atoolbox,liweitianux/atoolbox,liweitianux/atoolbox,liweitianux/atoolbox,liweitianux/atoolbox