Two AUX ephemeris files V01 and V01U for some days

[FredSchuller]

On the server, there are sometimes two aux-ephemeris files, for example:

	solo_L2_stix-aux-ephemeris_20231004_V01.fits	2023-10-25 15:14	383K
	solo_L2_stix-aux-ephemeris_20231004_V01U.fits	2023-10-27 22:06	383K

This seems to be the case for many days in October 2023. There are also days in September 2023 where only a V01U file is available, although the data should be complete by now...