ESA GNC Conference Papers Repository

Flight of a New Miniaturised and Integrated Spaceborne GNSS Receiver
Martin Unwin, R. de Vos van Steenwijk, A. Palfreyman, S. Miles, J. Rawlinson
Presented at:
Virtual Conference 2021
Full paper:

This paper describes the flight of a new Cubesat GNSS receiver, the SGR-Ligo. Firstly the needs for a new generation GNSS receiver are presented, both as a low power stand-alone unit for Cubesats, and as part on an integrated avionics suite. The unit must be low cost to manufacture, with low power consumption, and with future capability for GPS, GLONASS and in Galileo and Beidou signals. A second front-end is included to support inertially pointing missions. As a stand-alone unit the SGR-Ligo is flying on two satellites ? a frequency filings Cubesat mission VESTA-1, launched in December 2018, and ELSA-d target satellite for a chaser mission, launched in March 2021 The first implementation of the integrated SGR-Ligo is on 17kg technology demonstration satellite DoT-1, launched in summer 2019, de-risking future SSTL missions using this new avionics architecture. Furthermore the data from the two front-ends on DoT-1 is being diverted to a separate processor to permit the implementation of a new demonstration of GNSS-Reflectometry. In future, the SGR-Ligo will be at the heart of every coreDHS flown on SSTL?s upcoming constellations. Batch manufacture of the stand-alone SGR-Ligo batch manufacture will allow the availability of units at a low cost.