Hello Bill, the two GSC Ubuntu DEB packages (e.g. version 22.04) can be downloaded from here: gsc Global Star Catalog and gsc-data Global Star Catalog By inspecting the content of the Debian package (here version 20.04.1) one can see:
$ dpkg -c ./gsc_1.3_ubuntu20.04.1_amd64.deb drwxr-xr-x root/root 0 2019-10-30 08:55 ./ drwxr-xr-x root/root 0 2019-10-30 08:55 ./usr/ drwxr-xr-x root/root 0 2019-10-30 08:55 ./usr/bin/ -rwxr-xr-x root/root 27368 2019-10-30 08:55 ./usr/bin/decode -rwxr-xr-x root/root 38984 2019-10-30 08:55 ./usr/bin/gsc drwxr-xr-x root/root 0 2019-10-30 08:55 ./usr/share/ drwxr-xr-x root/root 0 2019-10-30 08:55 ./usr/share/doc/ drwxr-xr-x root/root 0 2019-10-30 08:55 ./usr/share/doc/gsc/ -rw-r--r-- root/root 277 2019-10-30 08:55 ./usr/share/doc/gsc/changelog.gz -rw-r--r-- root/root 1733 2019-10-30 08:55 ./usr/share/doc/gsc/copyright
$ dpkg -c ./gsc-data_1.3_ubuntu20.04.1_all.deb | head -n 25 drwxr-xr-x root/root 0 2019-10-30 08:55 ./ drwxr-xr-x root/root 0 2019-10-30 08:55 ./usr/ drwxr-xr-x root/root 0 2019-10-30 08:55 ./usr/share/ drwxr-xr-x root/root 0 2019-10-30 08:55 ./usr/share/GSC/ drwxr-xr-x root/root 0 2019-10-30 08:55 ./usr/share/GSC/N0000/ -rw-r--r-- root/root 31404 2019-10-30 08:55 ./usr/share/GSC/N0000/0001.GSC -rw-r--r-- root/root 38640 2019-10-30 08:55 ./usr/share/GSC/N0000/0002.GSC -rw-r--r-- root/root 31044 2019-10-30 08:55 ./usr/share/GSC/N0000/0003.GSC -rw-r--r-- root/root 37356 2019-10-30 08:55 ./usr/share/GSC/N0000/0004.GSC -rw-r--r-- root/root 35296 2019-10-30 08:55 ./usr/share/GSC/N0000/0005.GSC -rw-r--r-- root/root 33436 2019-10-30 08:55 ./usr/share/GSC/N0000/0006.GSC -rw-r--r-- root/root 31740 2019-10-30 08:55 ./usr/share/GSC/N0000/0007.GSC -rw-r--r-- root/root 28248 2019-10-30 08:55 ./usr/share/GSC/N0000/0008.GSC -rw-r--r-- root/root 30504 2019-10-30 08:55 ./usr/share/GSC/N0000/0009.GSC -rw-r--r-- root/root 40092 2019-10-30 08:55 ./usr/share/GSC/N0000/0010.GSC -rw-r--r-- root/root 26088 2019-10-30 08:55 ./usr/share/GSC/N0000/0011.GSC -rw-r--r-- root/root 33784 2019-10-30 08:55 ./usr/share/GSC/N0000/0012.GSC -rw-r--r-- root/root 36988 2019-10-30 08:55 ./usr/share/GSC/N0000/0013.GSC -rw-r--r-- root/root 28360 2019-10-30 08:55 ./usr/share/GSC/N0000/0014.GSC -rw-r--r-- root/root 31576 2019-10-30 08:55 ./usr/share/GSC/N0000/0015.GSC -rw-r--r-- root/root 29664 2019-10-30 08:55 ./usr/share/GSC/N0000/0016.GSC -rw-r--r-- root/root 29964 2019-10-30 08:55 ./usr/share/GSC/N0000/0017.GSC -rw-r--r-- root/root 26832 2019-10-30 08:55 ./usr/share/GSC/N0000/0018.GSC -rw-r--r-- root/root 30888 2019-10-30 08:55 ./usr/share/GSC/N0000/0019.GSC -rw-r--r-- root/root 35608 2019-10-30 08:55 ./usr/share/GSC/N0000/0020.GSC
$ git clone https://git.launchpad.net/gsc Cloning into 'gsc'... remote: Enumerating objects: 9636, done. remote: Counting objects: 100% (9636/9636), done. remote: Compressing objects: 100% (9603/9603), done. remote: Total 9636 (delta 5), reused 9623 (delta 4) Receiving objects: 100% (9636/9636), 234.35 MiB | 3.95 MiB/s, done. Resolving deltas: 100% (5/5), done. Updating files: 100% (9628/9628), done.