Earth-Moon Navigation / System Study and Development of a Highly-Sensitive Spaceborne Receiver Prototype
GPS has been used in space for more than 20 years and currently it is consistently used in LEO orbit satellites in order to provide position, velocity and time information. Extension of its use to higher altitude missions has been the subject of multiple studies, GEO and GTO orbits currently exploit GNSS signals and the NASA Magnetospheric Multiscale (MMS) mission has recently demonstrated that tracking of GPS signals is possible up to 70,000 km from Earth’s surface.
The possibility of extending GNSS for missions to the Moon has preliminarily been assessed by ESA via GSP (General Studies Programme). These preliminary studies conclude that navigation to the Moon using GNSS complemented by other instruments could be feasible, provided specific high-sensitivity techniques are implemented in receivers.
Emits link: http://emits.sso.esa.int/emits/owa/emits.main