High-precision time transfer and relative orbital determination among LEO satellites in real-time
For low-Earth-orbit (LEO) satellites, high-precision clock estimation often depends on high-precision real-time global navigation satellite system (GNSS) products. Thus, service providers often choose to downlink observation data to the ground to achieve high accuracy. To relieve this burden for fut...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Wiley-Blackwell
2024
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| Online Access: | http://purl.org/au-research/grants/arc/DP240101710 http://hdl.handle.net/20.500.11937/95559 |
| _version_ | 1848766026669359104 |
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| author | Wang, K. El-Mowafy, Ahmed Sun, B. Yang, X. |
| author_facet | Wang, K. El-Mowafy, Ahmed Sun, B. Yang, X. |
| author_sort | Wang, K. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | For low-Earth-orbit (LEO) satellites, high-precision clock estimation often depends on high-precision real-time global navigation satellite system (GNSS) products. Thus, service providers often choose to downlink observation data to the ground to achieve high accuracy. To relieve this burden for future LEO mega-constellations, this study investigates the performance of relative clocks and orbits determined between LEO satellites using the phase common-view (PCV) method. The PCV results are compared with results from three other single-satellite-based clock and orbit determination methods. Using real data from the Gravity Recovery and Climate Experiment (GRACE) Follow-On satellites and three different types of real-time GNSS products, the PCV method can deliver a relative clock precision below 0.2 ns and a relative orbital user range error of approximately 5 cm, even when using the broadcast ephemeris, whereas all three other methods encountered sharp degradations in their results when using degraded real-time GNSS products. |
| first_indexed | 2025-11-14T11:44:36Z |
| format | Journal Article |
| id | curtin-20.500.11937-95559 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:44:36Z |
| publishDate | 2024 |
| publisher | Wiley-Blackwell |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-955592024-09-24T08:44:40Z High-precision time transfer and relative orbital determination among LEO satellites in real-time Wang, K. El-Mowafy, Ahmed Sun, B. Yang, X. GNSS LEO time transfer positioning and navigation For low-Earth-orbit (LEO) satellites, high-precision clock estimation often depends on high-precision real-time global navigation satellite system (GNSS) products. Thus, service providers often choose to downlink observation data to the ground to achieve high accuracy. To relieve this burden for future LEO mega-constellations, this study investigates the performance of relative clocks and orbits determined between LEO satellites using the phase common-view (PCV) method. The PCV results are compared with results from three other single-satellite-based clock and orbit determination methods. Using real data from the Gravity Recovery and Climate Experiment (GRACE) Follow-On satellites and three different types of real-time GNSS products, the PCV method can deliver a relative clock precision below 0.2 ns and a relative orbital user range error of approximately 5 cm, even when using the broadcast ephemeris, whereas all three other methods encountered sharp degradations in their results when using degraded real-time GNSS products. 2024 Journal Article http://hdl.handle.net/20.500.11937/95559 10.33012/navi.659 http://purl.org/au-research/grants/arc/DP240101710 http://creativecommons.org/licenses/by/4.0/ Wiley-Blackwell fulltext |
| spellingShingle | GNSS LEO time transfer positioning and navigation Wang, K. El-Mowafy, Ahmed Sun, B. Yang, X. High-precision time transfer and relative orbital determination among LEO satellites in real-time |
| title | High-precision time transfer and relative orbital determination among LEO satellites in real-time |
| title_full | High-precision time transfer and relative orbital determination among LEO satellites in real-time |
| title_fullStr | High-precision time transfer and relative orbital determination among LEO satellites in real-time |
| title_full_unstemmed | High-precision time transfer and relative orbital determination among LEO satellites in real-time |
| title_short | High-precision time transfer and relative orbital determination among LEO satellites in real-time |
| title_sort | high-precision time transfer and relative orbital determination among leo satellites in real-time |
| topic | GNSS LEO time transfer positioning and navigation |
| url | http://purl.org/au-research/grants/arc/DP240101710 http://hdl.handle.net/20.500.11937/95559 |