Investigating the Impacts of Ionospheric Irregularities on Precise Point Positioning Over China and Its Mechanism
Abstract The impacts of ionospheric irregularities on precise point positioning (PPP) have been commonly noticed in the field of the ionosphere and the precise application of the Global Navigation Satellite System. But few attentions have been paid to how ionospheric irregularities deteriorate the p...
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| Format: | Article |
| Language: | English |
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Wiley
2022-11-01
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| Series: | Space Weather |
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| Online Access: | https://doi.org/10.1029/2022SW003236 |
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| author | Wei Li Shuli Song Weili Zhou Na Cheng Chao Yu |
| author_facet | Wei Li Shuli Song Weili Zhou Na Cheng Chao Yu |
| author_sort | Wei Li |
| collection | DOAJ |
| description | Abstract The impacts of ionospheric irregularities on precise point positioning (PPP) have been commonly noticed in the field of the ionosphere and the precise application of the Global Navigation Satellite System. But few attentions have been paid to how ionospheric irregularities deteriorate the performance of PPP. Aiming at exploring the mechanism of degradation of PPP solutions during the period of ionospheric irregularities, this paper investigates the impacts of ionospheric irregularities on the performance of kinematic PPP. The experiment uses GPS observation data sampled at the 30‐s interval over China on the days of 2014, 2015, and 2017 covering some active space weather, for example, solar and geomagnetic activities. The results show that the ionospheric irregularities caused increased positioning errors (decimeter‐ to meter‐level), enlarged phase residuals (decimeter‐level), and increased the number of detected cycle slips in PPP processing in low latitude regions of China. By proposing a novel strategy that compares the number of detected cycle slips from 30 s‐sampling interval data and 1s‐sampling interval data at the same station in an “aligned” mode, we present direct evidence of the existence of the falsely detected cycle slips in 30 s‐sampling interval data by the traditional cycle‐slip detection threshold in PPP processing. We reveal that the unnecessary and frequent reinitialization of ambiguity induced by the falsely detected cycle slips is dominantly responsible for the degradation of kinematic PPP solutions during the period of ionospheric irregularities. Our findings pointed out the direction for the improvement of kinematic PPP performance in the environment of ionospheric irregularities. |
| format | Article |
| id | doaj-art-7c0d729e01e14e7280e94242f2c29893 |
| institution | Kabale University |
| issn | 1542-7390 |
| language | English |
| publishDate | 2022-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | Space Weather |
| spelling | doaj-art-7c0d729e01e14e7280e94242f2c298932025-01-14T16:35:33ZengWileySpace Weather1542-73902022-11-012011n/an/a10.1029/2022SW003236Investigating the Impacts of Ionospheric Irregularities on Precise Point Positioning Over China and Its MechanismWei Li0Shuli Song1Weili Zhou2Na Cheng3Chao Yu4Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai ChinaShanghai Astronomical Observatory Chinese Academy of Sciences Shanghai ChinaShanghai Astronomical Observatory Chinese Academy of Sciences Shanghai ChinaShandong Jianzhu University Jinan ChinaShanghai Astronomical Observatory Chinese Academy of Sciences Shanghai ChinaAbstract The impacts of ionospheric irregularities on precise point positioning (PPP) have been commonly noticed in the field of the ionosphere and the precise application of the Global Navigation Satellite System. But few attentions have been paid to how ionospheric irregularities deteriorate the performance of PPP. Aiming at exploring the mechanism of degradation of PPP solutions during the period of ionospheric irregularities, this paper investigates the impacts of ionospheric irregularities on the performance of kinematic PPP. The experiment uses GPS observation data sampled at the 30‐s interval over China on the days of 2014, 2015, and 2017 covering some active space weather, for example, solar and geomagnetic activities. The results show that the ionospheric irregularities caused increased positioning errors (decimeter‐ to meter‐level), enlarged phase residuals (decimeter‐level), and increased the number of detected cycle slips in PPP processing in low latitude regions of China. By proposing a novel strategy that compares the number of detected cycle slips from 30 s‐sampling interval data and 1s‐sampling interval data at the same station in an “aligned” mode, we present direct evidence of the existence of the falsely detected cycle slips in 30 s‐sampling interval data by the traditional cycle‐slip detection threshold in PPP processing. We reveal that the unnecessary and frequent reinitialization of ambiguity induced by the falsely detected cycle slips is dominantly responsible for the degradation of kinematic PPP solutions during the period of ionospheric irregularities. Our findings pointed out the direction for the improvement of kinematic PPP performance in the environment of ionospheric irregularities.https://doi.org/10.1029/2022SW003236ionospheric irregularitiesGPSkinematic PPPcycle slip |
| spellingShingle | Wei Li Shuli Song Weili Zhou Na Cheng Chao Yu Investigating the Impacts of Ionospheric Irregularities on Precise Point Positioning Over China and Its Mechanism Space Weather ionospheric irregularities GPS kinematic PPP cycle slip |
| title | Investigating the Impacts of Ionospheric Irregularities on Precise Point Positioning Over China and Its Mechanism |
| title_full | Investigating the Impacts of Ionospheric Irregularities on Precise Point Positioning Over China and Its Mechanism |
| title_fullStr | Investigating the Impacts of Ionospheric Irregularities on Precise Point Positioning Over China and Its Mechanism |
| title_full_unstemmed | Investigating the Impacts of Ionospheric Irregularities on Precise Point Positioning Over China and Its Mechanism |
| title_short | Investigating the Impacts of Ionospheric Irregularities on Precise Point Positioning Over China and Its Mechanism |
| title_sort | investigating the impacts of ionospheric irregularities on precise point positioning over china and its mechanism |
| topic | ionospheric irregularities GPS kinematic PPP cycle slip |
| url | https://doi.org/10.1029/2022SW003236 |
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