Full
JIAO Yingxiang, PhD candidate, majors in satellite navigation and positioning, E-mail: 112104010003@home.hpu.edu.cn.
Outline
To address the issue of reduced accuracy in antenna rotation inversion due to the noise in ground-based phase wind-up(GPWU), we propose a real-time yaw angle inversion model that combines low-pass filtering, an improved reset Kalman filtering, and elevation angle weighting. After epoch differencing and low-pass denoising of the geometry-free measurements, the model identifies the time points of yaw angle change based on the variations of epoch-differenced geometry-free observations. We then use the reset Kalman filtering to predict yaw rate in real-time. Finally, the model optimizes the station antenna rotation rate calculated from all satellites, weighted by elevation angles, to obtain the final antenna rotation rate. The results show that the proposed method achieves a yaw rate prediction accuracy of 0.587° before Kalman filtering convergence, which improves to 0.245° after convergence, with a time error of less than 1 second.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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