Data collection

Argos satellite data collection 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 data collection & satellite location system, well-known as a worldwide system for observation. It offers one-way data transmission and is used by our VELA and MARGE V3 VMS transmitters.

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

Iridium satellite data collection system

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 data collection system, with voice and data communications. With 66 satellites, it’s the world’s largest commercial satellite constellation. It provides two-way communications and is used by our TRITON VMS and PILOT transmitters.

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