I just completed uploading all my satellite QSO's to LOTW, 1993-2001. I only did a handful of satellite contacts after that with my HT which I also uploaded.
It took a little bit of programming to convert the old storage locations of data (pre-LoTW) to the LoTW fields. I even uploaded my trips to EL39/EM30, EL19/EM10, FN21 and EM99. As there was no really great program that would allow changing all the necessary fields, I used Macro Express (which I use to automate my system). It allowed me to make mouse moves and clicks, change and massage text (AO10, AO13, AO27 to AO-10, AO-13, AO-27, etc) and add the prop mode which were never in existence when I started logging.
Then I setup a VUCC account in my LoTW account.
How many matched QSO's? 193 How many Grids for Satellite VUCC? 40
After loading the 6,000 QSO's, I checked back in about 15 minutes and had only matched 55 QSO's. When I checked the next day, there were the 193 matches. Guess LoTW takes a bit of time to run your matches. Maybe when I check back tomorrow, there will be more Grid matches as I just created the VUCC account.
That really is not a bad match percentage since many hams have since become SK and many have reached the age of non-operating. Also, those back then used either paper or early logging programs which have not been converted to LoTW format and uploaded. I gained no new DXCC entities. Unsure if I have any new grids, I will have to take the paper receipts from the ARRL and manually check them.
73...bruce