A video released by the Russian MoD showing footage of its recent Su-57 deployment to Syria revealed a recent aerial countermeasure modification was used during flight operations in the country.
Imagery from the May 2018 deployment of two aircraft to Latakia gives indication that a sensor, believed to have been added in 2014, was used as a precautionary measure during flight operations. Two small sensor modules are visible on the Su-57 aircraft featured in videos and recent photographs show similar modifications.
Justin Bronk, research fellow for airpower and technology at the Royal United Services Institute (RUSI), explained that the modules