From ARISS:
From October 3-5, 2023, the Russian team will do a test of some replacement components for the transmission of SSTV from the ISS–note, this is not a fully operational system yet. Some SSTV images will be downlinked from the ISS on 145.800 MHz.
A full set of images is not expected as with previous sessions. This is not an ARISS SSTV event, but posting your images to https://www.spaceflightsoftware.com/ARISS_SSTV/ and giving SWL reports will help to evaluate the test and are very welcome!
No ARISS SSTV awards will be given. A window may open at 1400 UTC but start time for images is unclear.