DJ0HO/MM = RV Polarstern?

The past two months or so DJ0HO/MM has been making spots from the area around the Antarctic Peninsula and the South Shetland Islands. It surprises me that almost no information can be found on DJ0HO, that no information about the DJ0HO/MM operations came out in the WSPR community, and that as far as I know nobody did any inquiries as to the background of the Maritime Mobile station. I did some research and I have good reasons to believe DJ0HO/MM is located onboard of the German research vessel RV Polarstern. See my blog entry of May 5th on for more info.
I hope somebody can confirm this was indeed the case and that somebody can provide the WSPR comunity with some more background information

This indeed is the RV Polarstern! I received the following information from Felix Riess DL5XL who posted the followoing on my blog (thanks, Felix!):

Jörg, DJ0HO, is an electronics engineer on board the German icebreaker "Polarstern". He uses a Red Pitaya STEMLab 125-14 with an active receiving antenna to monitor up to eight WSPR frequencies simultaneously and regularly uploads reception results to through the vessel's satellite link. DJ0HO will be on board until the ship returns to its home port of Bremerhaven, Germany, in June 2018.