Space navigation in very high Earth orbits and in lunar transfers is based mainly on ground-based tracking. It can be possible to spare the expensive and complex control segment by making the most of Global Navigation Satellite Systems (GNSS). A suitable receiver would be an application-specific sensor, based on software radio architecture and quite different from typical terrestrial devices, meaning that it will lacks the tracking section and will work in the so-called snapshot mode. The knowledge of the orbital dynamics and a moderate quality onboard clock can provide a first solution estimate which is accurate enough for the sensor to meaningfully exploit, with the help of a limited external aiding, the received signals. The receiver therefore becomes a navigation sensor working outside the primary GNSS service volume, where signals are extremely weak and frequently disrupted by outages.
GNSS software receiver as navigation sensor in very high orbits
01.05.2014
538841 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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