In March 1998, Hughes Space and Communications Company of El Segundo, Calif., was selected by PanAmSat Corporation of Greenwich, Conn., to build PAS-6B, a Hughes HS-601HP spacecraft model to provide direct-to-home television transmissions in South America. The satellite was launched Dec. 21, 1998.
Geostationary OrbitIridium provides global mobile telecommunications services using a constellation of 66 low earth orbit satellites in a 86.4° inclined orbit. Although 77 satellites were originally envisioned for the system and spawned the name based on the 77th element in the periodic table, the system has been scaled back. Motorola's Satellite Communications Group designed and manufactured the Iridium satellites with Lockheed Martin providing the LM-700A spacecraft buses.
Low Earth OrbitThe Mars Surveyor '98 program is comprised of two spacecraft launched separately, the MCO (Mars Climate Orbiter, formerly the Mars Surveyor '98 Orbiter) and the MPL (Mars Polar Lander, formerly the Mars Surveyor '98 Lander). The two missions were to study the Martian weather, climate, and water and carbon dioxide budget, in order to understand the reservoirs, behavior, and atmospheric role of volatiles and to search for evidence of long-term and episodic climate changes. The Mars Climate Orbiter was destroyed when a navigation error caused it to miss its target altitude at Mars by 80 to 90 km, instead entering the Martian atmosphere at an altitude of 57 km during the orbit insertion maneuver.
Heliocentric N/ASATMEX 5 is a Hughes HS-601HP or "high power" version of the body-stabilized spacecraft. It features more than 7,000 Watts of payload power, at least 10 times the capacity of Morelos II. Through such innovations as dual-junction gallium arsenide solar cells, radiation-cooled traveling-wave tube amplifiers (TWTAs), advanced battery technology, and a xenon ion propulsion system, XIPS, the HS-601HP can carry payloads twice as powerful as those on the HS 601 models, with an expected 15-year mission lifetime.
Geostationary OrbitThe satellite is a high-power version of the HS-376HP, spin-stabilized spacecraft, one of the most popular spacecraft models. The satellite was launched onboard a Delta-7925 rocket on Nov. 22, 1998. The delivery in-orbit contract included the satellite, launch vehicle services, and ground satellite control equipment for use at the control center, and training for the satellite controllers. The satellite is operated by the BONUM-1 control station, located in Moscow.
Geostationary Orbit