Title :
GNSS software receiver as navigation sensor in very high orbits
Author_Institution :
DIAEE - Dipt. di Ing. Astronautica, Elettr. ed Energetica, Sapienza Univ. di Roma, Rome, Italy
Abstract :
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.
Keywords :
satellite navigation; software radio; GNSS software receiver; Global Navigation Satellite Systems; ground-based tracking; lunar transfers; moderate quality onboard clock; navigation sensor; orbital dynamics; primary GNSS service volume; software radio architecture; very high Earth orbits; Global Positioning System; Moon; Orbits; Receivers; Space vehicles; GNSS; navigation sensors; pseudorange measurements; software receiver; space navigation;
Conference_Titel :
Metrology for Aerospace (MetroAeroSpace), 2014 IEEE
Conference_Location :
Benevento
DOI :
10.1109/MetroAeroSpace.2014.6865890