Tags: Artificialsatellite, Satellite.
OSCAR IV (aka OSCAR 4) is the fourth amateur radio satellite launched by Project OSCAR and the first targeted for Geostationary orbit on 12 December 1965. The satellite was launched piggyback with three United States Air Force satellites on a Titan IIIC launch vehicle. The satellite was regular tetrahedron 48 cm on each side. It had four independent monopole antennae and like Oscar 3 contained a tracking beacon transmitter and a communications repeater.