Hi Alex,
The VSS spreadsheet (downloadable from VSS web page) will convert UT to UT decimal and calendar date to JD.
You can batch upload observations to the database using the aforementioned spreadsheet, which takes a few seconds from beginning to end. Entering the data individually takes longer of course, but a single observation only takes about 30 seconds or less to enter.
It doesn’t matter how old your data is – we would very much like to have it.
Good to see you back!
Gary