Look in Data / Library / USSubParts / Sensors_Sub.dat & sim files. The main listing for the radar in the dat file is the 80:Node, but if you "Search" on its Id: in the sim file, you get an obj_extensible, listed as a snorkel, which is the mast the radar rides on. So use 85:Node - NSS_SS_Head, and search on its Id:0x2c40b16206e69cb2 in the sim file, and you'll get 64:SensorData in the sim, of which you of course edit the 65 listing for your settings. I don't remember which of the "height" settings you'd noodle with though, to avoid "painting" the surface vessels...