Relative Navigation in LEO by Carrier-Phase Differential GPS with Intersatellite Ranging Augmentation
Carrier-phase differential GPS (CDGPS) is a promising technology for accurate relative navigation in LEO formations of cooperating satellites, but navigation filter robustness against poor GPS geometry and noisy measurements has to be improved. This can be performed by augmenting the navigation filt...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | International Journal of Aerospace Engineering |
| Online Access: | http://dx.doi.org/10.1155/2013/627509 |
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| author | Alfredo Renga Michele Grassi Urbano Tancredi |
| author_facet | Alfredo Renga Michele Grassi Urbano Tancredi |
| author_sort | Alfredo Renga |
| collection | DOAJ |
| description | Carrier-phase differential GPS (CDGPS) is a promising technology for accurate relative navigation in LEO formations of cooperating satellites, but navigation filter robustness against poor GPS geometry and noisy measurements has to be improved. This can be performed by augmenting the navigation filter with intersatellite local ranging measurements, as the ones provided by ranging transponders or GNSS-like systems. In this paper, an augmented CDGPS navigation filter is proposed for the formation of two satellites characterized by a short, varying baseline, relevant to next generation Synthetic Aperture Radar missions. Specifically, a cascade-combination of dynamic and kinematic filters which processes double-differenced code and carrier measurements on two frequencies, as well as local inter-satellite ranging measurements, is used to get centimeter-level baseline estimates. The augmented filter is validated by numerical simulations of the formation orbital path. Results demonstrate that the proposed approach is effective in preserving the centimeter-level accuracy achievable by a CDGPS-only filter also in the presence of a poor GDOP or a limited number of GPS satellites in view. |
| format | Article |
| id | doaj-art-b7ed7249d6834c61b7596312289274bb |
| institution | Kabale University |
| issn | 1687-5966 1687-5974 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Aerospace Engineering |
| spelling | doaj-art-b7ed7249d6834c61b7596312289274bb2025-02-03T05:45:18ZengWileyInternational Journal of Aerospace Engineering1687-59661687-59742013-01-01201310.1155/2013/627509627509Relative Navigation in LEO by Carrier-Phase Differential GPS with Intersatellite Ranging AugmentationAlfredo Renga0Michele Grassi1Urbano Tancredi2Department of Aerospace Engineering, University of Naples “Federico II,” Piazzale Tecchio 80, 80125 Naples, ItalyDepartment of Aerospace Engineering, University of Naples “Federico II,” Piazzale Tecchio 80, 80125 Naples, ItalyDepartment for Technologies, University of Naples “Parthenope,” Centro Direzionale, Isola C4, 80143 Naples, ItalyCarrier-phase differential GPS (CDGPS) is a promising technology for accurate relative navigation in LEO formations of cooperating satellites, but navigation filter robustness against poor GPS geometry and noisy measurements has to be improved. This can be performed by augmenting the navigation filter with intersatellite local ranging measurements, as the ones provided by ranging transponders or GNSS-like systems. In this paper, an augmented CDGPS navigation filter is proposed for the formation of two satellites characterized by a short, varying baseline, relevant to next generation Synthetic Aperture Radar missions. Specifically, a cascade-combination of dynamic and kinematic filters which processes double-differenced code and carrier measurements on two frequencies, as well as local inter-satellite ranging measurements, is used to get centimeter-level baseline estimates. The augmented filter is validated by numerical simulations of the formation orbital path. Results demonstrate that the proposed approach is effective in preserving the centimeter-level accuracy achievable by a CDGPS-only filter also in the presence of a poor GDOP or a limited number of GPS satellites in view.http://dx.doi.org/10.1155/2013/627509 |
| spellingShingle | Alfredo Renga Michele Grassi Urbano Tancredi Relative Navigation in LEO by Carrier-Phase Differential GPS with Intersatellite Ranging Augmentation International Journal of Aerospace Engineering |
| title | Relative Navigation in LEO by Carrier-Phase Differential GPS with Intersatellite Ranging Augmentation |
| title_full | Relative Navigation in LEO by Carrier-Phase Differential GPS with Intersatellite Ranging Augmentation |
| title_fullStr | Relative Navigation in LEO by Carrier-Phase Differential GPS with Intersatellite Ranging Augmentation |
| title_full_unstemmed | Relative Navigation in LEO by Carrier-Phase Differential GPS with Intersatellite Ranging Augmentation |
| title_short | Relative Navigation in LEO by Carrier-Phase Differential GPS with Intersatellite Ranging Augmentation |
| title_sort | relative navigation in leo by carrier phase differential gps with intersatellite ranging augmentation |
| url | http://dx.doi.org/10.1155/2013/627509 |
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