Argos satellite system

7 satellites operational

100mn are necessary to complete 1 total orbit

Satellites are drifting at 850 km altitude

The ground visibility is 5000 km

Argos is a unique worldwide satellite location & data collection system which is consolidating its role as a worldwide system for observation & protecting the earth’s environment.

Argos is operated and managed worldwide, by CLS Group, a CNES subsidiary and several other international space agencies also actively participate in the Argos system including :

  • French Space Agency (CNES),
  • National Oceanic and Atmospheric Administration (NOAA, USA),
  • National Aeronautics and Space Administration (NASA , USA),
  • Eumetsat (European Organization of the Exploitation of Meterological Satellites),
  • Indian Space Research Organization (ISRO)

Iridium satellite communications

6 polar orbital planes with 11 satellites per plane

Low Earth Orbit (LEO)  = 780 km altitude

Each satellite completely circles the earth once every 100 minutes

Each satellite travels from horizon to horizon in 10 minutes

IRIDIUM is a global mobile satellite communications system, with voice and data solutions. With 66 satellites, it’s the world’s largest commercial satellite constellation

When choose Argos or Iridium?


  • Global coverage
  • Reliable
  • Robust in harsh conditions
  • Often selected as a back-up
  • Low power consumption
  • GPS-free positioning
  • Processing fee independent of data volume
  • Low cost for modem & antennas

ARGOS for studying and protecting environment


  • Real-time system
  • Reliable
  • Global and continuous coverage
  • High-data rate (2400 bits per second)
  • Two-way communications
  • SBD, CSD & RUDICS capabilities

IRIDIUM voice and data coverage to satellite phones and transceivers