July 31, 2014

Ground segment

Orbital operations were controlled from the Picard Ground Segment, comprising two entities:

  • The MIGS (MIcrosatellite Ground Segment), which for the operations phase was made up of at least four components:
    • A Command-Control Centre (CCC), comprising a nominal centre and a back-up centre.
    • Six 2-GHz transmission and receiving stations (SCC or TTCET, for Telemetry and TeleCommand Earth Terminal).
    • A Data Communication Network (DCN).
    • A file transfer server (SEF) for exchanging files with the Mission Centre.

  • A User Ground Segment comprising two entities:
    • A Picard Science Mission Centre (CMS-P) in Brussels, tasked chiefly with processing data from the payload. The CMS-P’s main functions were to:
      • Acquire data needed for CMS-P operations
      • Task the payload
      • Monitor the payload’s health status
      • Generate and distribute mission science products (Levels 0 to 2A)

    • Picard Science Expertise Centres at the research laboratories in charge of instrument development: LATMOS (France) for the SODISM imaging telescope, RMI (Belgium) for the SOVAP radiometer, PMOD (Switzerland) for the PREMOS radiometer and photometers, OCA for ground-based instruments and the laboratories/institutes on the Picard science team. The main roles of these centres were to:
      • conduct detailed analysis of how the instruments worked
      • accomplish final calibration, produce science results (levels 2B and 3) and deliver them to users through data centres