The DFH-3 satellite is a medium-capacity geostationary communications satellite based on the DFH-3 Bus (three-axis-stabilized telecommunications satellite platform). The 2200 kg satellite carries 24 C-band transponders, providing six television channels and 18 communications transmission channels. It has a power supply of 2 kW and a design life of 8 years.
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 Orbit