SSTV Event from ISS
These should be the standard PD120 format transmitting with gaps of 2 minutes and using 145.800 MHz.
SSTV from the ISS is sent on 145.800 MHz using the PD120 format. Schedule is Dec. 16 at 10:15 UTC | 5:15 AM ET through Dec. 19 around 1800 UTC | 1:00 PM ET.
Ham Satèlites PR on Facebook will give a certificate for the event from the 16th to the 19th. Requirement to receive a photo of at least 50% readable.