Adaptive Kalman Filter for Real-Time Precise Orbit Determination of Low Earth Orbit Satellites Based on Pseudorange and Epoch-Differenced Carrier-Phase Measurements
Real-time precise orbit determination (POD) of low earth orbiters (LEOs) is crucial for orbit maintenance as well as autonomous operation for space missions. The Global Positioning System (GPS) has become the dominant technique for real-time precise orbit determination (POD) of LEOs. However, the ob...
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| Format: | Article |
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MDPI AG
2022-05-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/9/2273 |
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| author | Min Li Tianhe Xu Yali Shi Kai Wei Xianming Fei Dixing Wang |
| author_facet | Min Li Tianhe Xu Yali Shi Kai Wei Xianming Fei Dixing Wang |
| author_sort | Min Li |
| collection | DOAJ |
| description | Real-time precise orbit determination (POD) of low earth orbiters (LEOs) is crucial for orbit maintenance as well as autonomous operation for space missions. The Global Positioning System (GPS) has become the dominant technique for real-time precise orbit determination (POD) of LEOs. However, the observation conditions of near-earth space are more critical than those on the ground. Real-time POD accuracy can be seriously affected when the observation environment suffers from strong space events, i.e., a heavy solar storm. In this study, we proposed a reliable adaptive Kalman filter based on pseudorange and epoch-differenced carrier-phase measurements. This approach uses the epoch-differenced carrier phase to eliminate the ambiguities and thus reduces the significant number of unknown parameters. Real calculations demonstrate that four to five observed GPS satellites is sufficient to solve reliable position parameters. Furthermore, with accurate pseudorange and epoch-differenced carrier-phase-based reference orbits, orbital dynamic disturbance can be detected precisely and reliably with an adaptive Kalman filter. Analyses of Swarm-A POD show that sub-meter level real-time orbit solutions can be obtained when the observation conditions are good. For poor observation conditions such as the GRACE-A satellite on 8 September 2017, when fewer than five GPS satellites were observed for 14% of the observation time, 1–2 m orbital accuracy can still be achieved with the proposed approach. |
| first_indexed | 2024-03-10T03:43:49Z |
| format | Article |
| id | doaj.art-4e7bfe52948248b6bb340ae442f73a7b |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T03:43:49Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-4e7bfe52948248b6bb340ae442f73a7b2023-11-23T09:13:12ZengMDPI AGRemote Sensing2072-42922022-05-01149227310.3390/rs14092273Adaptive Kalman Filter for Real-Time Precise Orbit Determination of Low Earth Orbit Satellites Based on Pseudorange and Epoch-Differenced Carrier-Phase MeasurementsMin Li0Tianhe Xu1Yali Shi2Kai Wei3Xianming Fei4Dixing Wang5Institute of Space Sciences, Shandong University, Weihai 264209, ChinaInstitute of Space Sciences, Shandong University, Weihai 264209, ChinaInstitute of Space Sciences, Shandong University, Weihai 264209, ChinaCollege of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, ChinaBeijing Urban Construction Exploration & Surveying Design and Research Institute, Beijing 100101, ChinaInstitute of Space Sciences, Shandong University, Weihai 264209, ChinaReal-time precise orbit determination (POD) of low earth orbiters (LEOs) is crucial for orbit maintenance as well as autonomous operation for space missions. The Global Positioning System (GPS) has become the dominant technique for real-time precise orbit determination (POD) of LEOs. However, the observation conditions of near-earth space are more critical than those on the ground. Real-time POD accuracy can be seriously affected when the observation environment suffers from strong space events, i.e., a heavy solar storm. In this study, we proposed a reliable adaptive Kalman filter based on pseudorange and epoch-differenced carrier-phase measurements. This approach uses the epoch-differenced carrier phase to eliminate the ambiguities and thus reduces the significant number of unknown parameters. Real calculations demonstrate that four to five observed GPS satellites is sufficient to solve reliable position parameters. Furthermore, with accurate pseudorange and epoch-differenced carrier-phase-based reference orbits, orbital dynamic disturbance can be detected precisely and reliably with an adaptive Kalman filter. Analyses of Swarm-A POD show that sub-meter level real-time orbit solutions can be obtained when the observation conditions are good. For poor observation conditions such as the GRACE-A satellite on 8 September 2017, when fewer than five GPS satellites were observed for 14% of the observation time, 1–2 m orbital accuracy can still be achieved with the proposed approach.https://www.mdpi.com/2072-4292/14/9/2273real-timelow earth orbitersadaptive Kalman filterepoch-differenced carrier-phase |
| spellingShingle | Min Li Tianhe Xu Yali Shi Kai Wei Xianming Fei Dixing Wang Adaptive Kalman Filter for Real-Time Precise Orbit Determination of Low Earth Orbit Satellites Based on Pseudorange and Epoch-Differenced Carrier-Phase Measurements Remote Sensing real-time low earth orbiters adaptive Kalman filter epoch-differenced carrier-phase |
| title | Adaptive Kalman Filter for Real-Time Precise Orbit Determination of Low Earth Orbit Satellites Based on Pseudorange and Epoch-Differenced Carrier-Phase Measurements |
| title_full | Adaptive Kalman Filter for Real-Time Precise Orbit Determination of Low Earth Orbit Satellites Based on Pseudorange and Epoch-Differenced Carrier-Phase Measurements |
| title_fullStr | Adaptive Kalman Filter for Real-Time Precise Orbit Determination of Low Earth Orbit Satellites Based on Pseudorange and Epoch-Differenced Carrier-Phase Measurements |
| title_full_unstemmed | Adaptive Kalman Filter for Real-Time Precise Orbit Determination of Low Earth Orbit Satellites Based on Pseudorange and Epoch-Differenced Carrier-Phase Measurements |
| title_short | Adaptive Kalman Filter for Real-Time Precise Orbit Determination of Low Earth Orbit Satellites Based on Pseudorange and Epoch-Differenced Carrier-Phase Measurements |
| title_sort | adaptive kalman filter for real time precise orbit determination of low earth orbit satellites based on pseudorange and epoch differenced carrier phase measurements |
| topic | real-time low earth orbiters adaptive Kalman filter epoch-differenced carrier-phase |
| url | https://www.mdpi.com/2072-4292/14/9/2273 |
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