Track IRIDIUM 77 Satellite in Real Time
Detailed information about IRIDIUM 77 satellite
Designator id: 1998-051E
Description of IRIDIUM 77 Satellite:
Iridium 77 was part of a planned commercial communications network comprised of a constellation of 66 LEO spacecraft. The system will use L-Band to provide global communications services through portable handsets. A total of 125 spacecraft will be built by Lockheed for more than $700M. Commercial service is planned to begin in 1998. The system will employ 15-20 ground stations with a master control complex in Landsdowne, VA, a backup in Italy, and a third engineering center in Chandler, AZ. The spacecraft was 3-axis stabilized, with a hydrazine propulsion system. It had 2 solar panels with 1-axis articulation. The system employed L-Band using FDMA/TDMA to provide voice at 4.8 kbps and data at 2400 bps with 16 dB margin. Each satellite had 48 spot beams for Earth coverage and used Ka-Band for crosslinks and ground commanding.
1 25471U 98051E 12339.33839188 -.00000235 00000-0 -90851-4 0 2085 2 25471 086.3940 353.8251 0002751 076.4438 283.7094 14.34212719750701