Not much information available on the internet for the this type, this basically sums it up.
"The aircraft is configured to carry the MRC-411 multi-intelligence payload, to include electronic intelligence (ELINT) sensors, side-looking Synthetic Aperture Radar (SAR) and other Signals Intelligence (SIGINT) and Communications Intelligence (COMINT). In addition, the aircraft will carry multi-spectral electro-optical systems, providing a true Multi-Int support to Russian military forces.
I wonder if this is the first active deployment of the type, or if it is just a continuation of the trial works that has been going on? Maybe Moscow is just flashing its wares to the West? Timing seems very co-incidental with the build up of Turkish forces on the border.