- January 2008: MAG instrument proposal submitted to ESA
- October 2011: Solar Orbiter adopted by ESA as mission M1
- January 2012: MAG instrument passes Preliminary Design Review
- August 2014: MAG instrument passes Critical Design Review
- February 2017: MAG Instrument passes Flight Acceptance Review
- January 2019: MAG sensors are installed onto the spacecraft
- May 2019: final version of MAG software is uploaded to the instrument
- February 2020: Solar Orbiter launch
All the hardware of the Solar Orbiter magnetometer has been developed at Imperial College London.
The instrument is a conventional dual fluxgate instrument, but has required a number of technology developments for this mission:
Thermal and mechanical design: the magnetometers will be in shadow behind the spacecraft on the instrument boom, leading to extremely low temperatures (down to -140 degrees C). This, combined with high vibration loads during launch, has required a re-design of the thermal and mechanical aspects of the sensor housing.
SpaceWire: the communications interface to the spacecraft is via SpaceWire, which has required the implementation of a real-time operating system (RTEMS is being used) to manage data flow and the spacecraft interface.
Digital magnetometer design: the sense electronics of the magnetometer are controlled by a FPGA, rather than a traditional analogue design.
Magnetometers built in our labs at Imperial College London have successfully operated throughout the Solar System: on Cassini in orbit around Saturn; on Ulysses over the poles of the Sun; and on the four Cluster and two Double Star spacecraft in Earth orbit. We have also provided flight hardware for the Rosetta, Venus Express and Bepi Colombo spacecraft - see the magnetometer laboratory web pages for more information.