Bepi Colombo is an interplanetary mission to Mercury jointly implemented by the European space agency ESA and the Japanese space agency JAXA. The mission includes four main modules.

Main modules for the MOSIF mission

  • Mercury Transfer Module (MTM)
  • Mercury Planetary Orbiter (MPO)
  • Sunshield (MOSIF)
  • Mercury Magnetospheric Orbiter (MMO)

These four modules will be separated after the arrival at Mercury. During the transfer from the earth MOSIF will protect the MMO from sun radiation.

MOSIF thermal test model

Due to delays in the delivery of the MOSIF structure PFM, the industrial prime and ESA decided to procure a specific thermal test model of the MOSIF structure, referred to as MSTTM, in order to keep the thermal test schedule. SpaceTech has been selected for the MSTTM delivery and successfully performed all required activities within the tight schedule of only 3 months:

  • PFM design adaptation
  • Thermal and strength analysis
  • Parts procurement/manufacturing and integration
  • Coating
  • Final assembly at ESTEC

MOSIF Structure Thermal Test Model Performance Summary

In October 2010, the MOSIF structure thermal test model has been delivered in-schedule to ESA which stated that the SpaceTech performance in designing, and building the MSTTM was impressive.


The project work is/was carried out under a programme of and funded by the European Space Agency (ESA). The view expressed herein can in no way be taken to reflect the official opinion of the European Space Agency.

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