Sorry Gents but stumbled over something which I didn't understand and since there is a quite a few SME around you guys I though it may be something you can bring heads and tails on.

In this articelhttp://nordic.businessinsider.com/a-10-russia-jet-downed-syria-target-2018-2?r=US&IR=T

they have the following sentence;
"Neither A-10s nor Su-25s are equipped with radars that can detect heat-seeking missiles from MANPADs, Bronk said. They're only equipped with radar warning receivers."

I may just be my missing noob knowledge but does such a system exist at all.

cheers