Newer satellite mode-names do use a combination of two letters, representing the up- and down-link band.
As there are: H 15m, T 10m, V 2m, U 70cm, L 23cm, S 13cm, C 6cm, X 3cm, K 1,2cm, Q 6mm
Maybe it might be a good idea to give the user an editable list, if this is not to much to change. This might be
a good way to be prepared for any future changes. Of course you might fill a default list as a starter.
Thanks a lot.