Galaxy 18

Galaxy 18 is a C- and Ku-band satellite with 24 C-band and 24 Ku-band transponders. The spacecraft is a version of SS/L's space-proven SSL-1300 satellite platform, which has an excellent record of reliable operation. The geostationary SSL-1300 has a designed service life of 15 years and maintains station-keeping and orbital stability by using bipropellant propulsion and momentum-bias systems. A system of high efficiency solar arrays and lightweight batteries provides uninterrupted electrical power.