Satellite constellation/List

Learning Task

 * Explore the list of satellite constellations and explain the similarities and differences between those constellations!

Communications satellite constellations
See also Satellite communication and the Communications Satellite Constellations

Broadcasting

 * Sirius Satellite Radio
 * XM Satellite Radio
 * Othernet
 * Molniya (discontinued)

Monitoring

 * Spire (AIS, ADS-B)
 * Iridium (AIS, ADS-B)
 * Hiber Global (IoT)
 * TDRSS

Two-way communication

 * Broadband Global Area Network (BGAN)
 * Globalstar
 * Iridium NEXT
 * O3b
 * Orbcomm
 * Defense Satellite Communications System (DSCS) (military system)
 * Wideband Global SATCOM (military system)

A number of systems were proposed in the past but never realised:


 * Celestri
 * Teledesic

A number of next-generation telecommunications satellite constellations are in-development:

Observational satellite constellations
See also List of Earth observation satellites.


 * Planet Labs
 * Pléiades 1A and 1B
 * RapidEye
 * Disaster Monitoring Constellation
 * A-train
 * SPOT 6 and SPOT 7
 * Spire