ExoMars News

Radiation Conditions in Interplanetary Space Became Worse

    Since April 16, 2018 Liulin-MO aboard ExoMars Trace Gas Orbiter operates successfully on TGO science orbit – a circular orbit at 400 km above Mars with a period of two hours. Solar activity decreases, the 24th Solar Cycle is at its minimum now. Liulin-MO measures the GCR flux and the radiation doses they deliver since TGO began its journey to Mars. Figure 1 presents the development of Solar Cycle 24 and the intervals of Liulin-MO operations. MCO indicate the initial highly elliptic Mars Capture Orbits.


Liulin-MO Operates on Mars Orbit!

    The Trace Gas Orbiter satellite launched under the ESA-Roscosmos project ExoMars reached Mars in October 2016. During TGO transit to Mars our dosemeter Liuli-MO (a unit of the Russian neutron detector FREND) performed perfectly and we obtained unique results about the radiation environment along an Earth-Mars journey. These results are already published in ICARUS journal (https://doi.org/10.1016/j.icarus.2017.12.034).

Liulin-MO first data

Liulin-MO first data Available Liulin-MO data during the TGO cruise: 06.04.2016 – first turned on during NECP:

  • Checked nominal side with nominal power unit & nominal side with redundant power unit.
  • The dosimeter demonstrated to be in good health and performs valid physical measurements.
  • From 22.04 to 18.07 one of the 3He and the scintillate detectors of FREND, as well as Liulin-MO were turned on almost continuously.
  • From 19.07 to 11.08 during Deep Space Maneuvers of TGO FREND and Liulin-MO were turned off.
  • Since 12.08.2016-currently Liulin-MO is turned on.
  • During that time the dosimeter has measured the dosimetric parameters of GCR.