JUH-1 SOTAS
The JUH-1 was a modified UH-1H an AN/APS 94 radar system mounted in a rotating boom on the belly, where the cargo hook had been. The aircraft's skid landing gear was modified to retract allowing the radar antennae to rotate while in flight. The JUH-1s also incorporated an autopilot and improved navigation avionics. The radar system was connected by datalink to a ground station for analysis of the radar images.
At least four UH-1Hs were modified to JUH-1s for use by the US Army in Europe and Korea for use as technology demonstrators in the Stand Off Target Acquisition System (SOTAS) program. They were first deployed in 1975 but by 1986 they had been replaced by the EH-60 Black Hawk.
Read more about this topic: Bell UH-1 Iroquois Variants