Myriade is a European miniaturized satellite platform developed by EADS Astrium and CNES. EADS Astrium offers the Myriade bus under the commercial name Astrosat-100. CNES began developing Myriade in 1998, as a continuation of the Proteus program.


Myriade satellites are cube-shaped, measuring 60 cm along one side, and weigh between 100 and 200 kg. The control system is a Transputer T805 with 1 Gigabit of memory and capable of 5 MIPS. It is interfaced via i2c to FPGA and PIC microcontrollers that control onboard equipment. Power is provided by one steerable gallium arsenide solar array. Communication is by two S band transceivers, offering downlink rates of up to 400 kbit/s, and an optional X band system with downlink rates of 18-72 Mbit/s.

Launched Myriade satellites

The first Myriade based system was Demeter (Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions), launched in June 2004.

Since then, missions have included:

  • PARASOL, a French-built Earth observing research satellite - launched in December 2004.
  • Essaim, a French military reconnaissance microsatellite constellation - launched in December 2004.
  • Spirale, a demonstrator system which includes two 120 kilograms (260 lb) microsatellites - launched in February 2009.
  • Picard, dedicated to the simultaneous measurement of the absolute total and spectral solar irradiance, the diameter and solar shape, and to probing the Sun's interior - launched in June 2010.
  • ELISA : ELISA 1, ELISA 2, ELISA 3 and ELISA 4 are a suite of French military satellites - launched on December 17, 2011.
  • MICROSCOPE, ministallite designed to test the weak equivalence principle to two orders of magnitude better than can be achieved by ground-based experiments.[1][needs update] Launched in 25 April 2016.
  • TARANIS,[2][3][4] launched in November 2020 but experienced launch failure (due to rocket) and did not achieve orbit.

Prospective missions


  • eoPortal directory: Myriade (CNES Microsatellite Program)
  • Tatry, B.; Claire, M.-A. (November 2004). Warmbein, B. (ed.). "Myriade Microsatellites: a new way for agencies and industry to various missions". ESA Special Publication. 571. Bibcode:2004ESASP.571E...4T. 4. {{cite journal}}: Cite journal requires |journal= (help)

Share this article:

This article uses material from the Wikipedia article Myriade, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.