Trumpet signal intelligence satellites were launched by Titan-4(01)A Centaur-T into highly elliptic Molniya-type orbits. In their elliptical orbits they would move very slowly over the northern hemisphere for most of their orbital period, allowing interception of microwave line-of-sight communications beams. Since they would move slowly through the beams during their orbit, a constellation of such satellites was required to monitor Soviet communications throughout the day.
Geostationary OrbitThe satellites of the SCD (Satelites de Coleta de Dados) series are equipped to collect and transmit meteorological and environmental data collected by automatic platforms (PCD) installed on land or on oceanic buoys. The data is relayed to one or more ground stations.
Low Earth OrbitDSCS-3 (Defense Satellite Communications System 3) are geostationary communications satellites, which provide a robust anti-jam, nuclear hardened capability that supports Department of Defense (DoD) worldwide requirements, White House and Diplomatic communications. They are the follow-on generation of the DSCS-2 satellites.
Geostationary OrbitSpace Systems/Loral's (SS/L) Apstar-2R is one of the most powerful spacecraft in Asia-Pacific service. Launched in China in 1997 by APT Satellite Company, Ltd., the satellite offers regional voice, video, and data services to an area large enough to link Europe, Russia, the Middle East, Africa, and the Asia-Pacific region into a broad telecommunications network.
Geostationary Orbit