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OPS 9344 (IDSCS 23)

Track IRIDIUM 21 Satellite in Real Time

Detailed information about IRIDIUM 21 satellite

Designator id: 1999-032B

Description of IRIDIUM 21 Satellite:

Iridium 21A was part of a planned commercial communications network comprised of a constellation of 66 LEO spacecraft. It replaced Iridium 21 in the constellation. 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.

Technical data:

Launch Date: 1999-06-11
Launch Vehicle: Long March 2C
Launch Site: Taiyuan, Peoples Republic of China
Mass: 556.0 kg

Funding Agencies:

Iridium (United States)



Source: Nasa

Two Line Element Set (TLE):
1 25778U 99032B   12339.16269177  .00000226  00000-0  73500-4 0   337
2 25778 086.3952 196.1228 0003719 097.7232 262.4388 14.34216413710755

Last TLE update on :2012-12-04

Find more details about IRIDIUM 21 Satellite