التفاصيل البيبلوغرافية
| العنوان: |
不同分析中心 BDS-3 姿态四元数产品比较及 其在 PPP 中的应用. |
| Alternate Title: |
Comparison of BDS-3 Satellite Attitude Quaternions Products from Different Analysis Centers and Their Application to PPP. |
| المؤلفون: |
田福娟1 Fjtian@whu.edu.cn, 聂琳娟1 ljnie@whu.edu.cn, 周晓慧2 |
| المصدر: |
Geomatics & Information Science of Wuhan University. Oct2024, Vol. 49 Issue 10, p1891-1899. 9p. |
| مصطلحات موضوعية: |
*ORBIT determination, *ARTIFICIAL satellites in navigation, *GLOBAL Positioning System, *QUATERNIONS, *ATTITUDE (Psychology), *ARTIFICIAL satellite attitude control systems |
| Abstract (English): |
Objectives: The satellite attitude quaternion products have been proposed by International GNSS Service in the third data reprocessing campaign (repro3). These satellite attitude quaternion products are not only contributed to combining the precise satellite products during the eclipse season, but also can improve the reliability of precision point positioning (PPP) when satellites are in abnormal yaw attitude. Methods: The four final and rapid BeiDou-3 satellite navigation system (BDS-3) satellite attitude products provided by Wuhan University (WHU), Geo Forschungs Zentrum and Center for Orbit Determination in Europe have been compared. Attitude model characteristic of BDS-3 with different type from different analysis centers have been also analyzed in the eclipse seasons, and the effect of different satellite model on satellite clock and kinematic PPP have been investigated. Results: The results demonstrate that the BDS-3 yaw angle difference can reach up about 120° from different analysis centers when the sun elevation angle is approximately 0°. In this period, different analysis centers used different attitude models. Furthermore, when the satellite attitude quaternions are used from different analysis centers, the PPP positing accuracy can be improved during the eclipse season. In detail, a significant improvement rate is achieved by using WHU rapid products, compared with nominal attitude strategy, the 3D positioning accuracy of kinematic PPP solutions with satellite attitude quaternions can be improved approximately 18. 4%. Conclusion: Although the positioning accuracy of PPP solutions can be improved by using the publicly BDS-3 attitude model, various attitude strategies may be adopted in different analysis centers. Therefore, in order to obtain reliable PPP results, the satellite attitude quaternions should be used. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
国际卫星导航服务组织在第三次重处理中推出了卫星姿态四元数产品, 该产品不仅有利于地影期间各分析中心 精密产品的综合, 同时也有助于提高卫星姿态异常时期精密单点定位 (precise point positioning, PPP) 的可靠性。对武汉 大学 (Wuhan University, WHU) 、德国地学研究中心和欧洲定轨中心 3 家分析中心提供的 4 种北斗三号卫星导航系统 (BeiDou-3 satellite navigation system, BDS-3) 最 终/快 速 姿 态 四 元 数 产 品 进 行 了 比 较, 分 析 了 各 个 产 品 对 不 同 类 型 的 BDS-3 卫星所采用的姿态模型的特点, 并探究了不同卫星姿态对 BDS-3 动态 PPP 定位的影响。结果表明, 在卫星太阳 高度角接近 0°时, 不同分析中心采用了不同的 BDS-3 姿态模型, 其偏航角差异可高达约 120°；使用各个分析中心配套的 姿态四元数, 地影期间动态 PPP 三维定位精度都得到一定的提升, 其中, 采用 WHU 快速产品的提升率较为显著, 与采用 名义姿态相比, 使用四元数产品后, 动态 PPP 的三维定位精度可提高约 18.4%。虽然采用目前公开的 BDS-3 模型姿态对 PPP 定位有所改善, 但不同分析中心对精密产品估计时采用的卫星姿态可能会有所不同, 因此, 配套使用各分析中心提 供的姿态四元数才能获得可靠的定位结果。 [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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