Preparation for the first flight of SSTL´s next generation space GNSS receivers

This paper discusses the new GNSS receiver architecture being designed by SSTL, and its preparation for use in space. The first application is the SGR-ReSI experiment that will be flying on the TechDemoSat-1 mission in 2013. This will allow the collection of GPS Reflected signals for validating ocean models, and also an early prototype service to notify users about wind and waves. The SGR-Axio is an advanced GNSS receiver based upon the SGR-ReSI and intended to replace the SGR-10 on low Earth orbit satellites. It has many advanced capabilities such as multi-antenna, dual frequencies and multisignals. The SGR-Axio has been designed to accommodate the Chip Scale Atomic Clock to provide an improved timing service. The paper also discusses CYGNSS, a new NASA satellite project that deploys the SGR-ReSI onto 8 small satellites for sensing hurricanes.