Details are a bit sketchy at this point but it appears that the Moscow Aviation Institute will be conduction SSTV image transmissions from ISS on April 14 from around 15:00 to 18:00 UTC and again on April 15 from around 14:00 to 19:00. It appears they will be using the large image quality transmission mode of PD290 during this period. Folks will have to be extremely lucky to capture a full image during a pass of the ISS since the transmission time for each image will be nearly 5 minutes and there should be a gap between image transmissions to reduce the duty cycle on the radio. Transmissions are planned to occur on 145.800 MHz.
*** Update (April 14)
Getting reports that PD180 is being used for MAI-75 as well. This could be to not changing the mode from the previous event or a change in operational planning. Will have to wait and see if the mode stays the same or changes.