Myriade 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.Description 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 , launched in June 2004 . 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 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. Launched in 25 April 2016 .Prospective missions TARANIS , scheduled for launch in 2019.
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