Overview of CODE's MGEX solution with the focus on Galileo
Overview of CODE's MGEX solution with the focus on Galileo
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DOI：
10.1016/j.asr.2020.04.038
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发表时间：
2020-12-15
影响因子：
2.6
通讯作者：
Jaggi, Adrian
中科院分区：
文献类型：
--
作者：
Prange, Lars;Villiger, Arturo;Jaggi, Adrian
本文介绍了CODE分析中心在多GNSS扩展（MGEX）框架内向国际GNSS服务（IGS）提供的多GNSS轨道和时钟解决方案（COM）的最新情况。近年来，在轨道建模（地球轨道、发射天线推力、热辐射、日食姿态定律）、接收器和发射器天线校准、地面跟踪网络、数据传播、卫星星座的完整性、与航天器有关的Meta信息的提供、观测偏差和模糊度解决等领域取得了实质性进展。这导致了轨道和时钟参数估计的改进，这对欧洲全球导航卫星系统伽利略系统来说是很大的，在很大程度上归功于所披露的航天器Meta数据的可用性。采用不同的验证方法（SLR残差、轨道密合、钟改正线性拟合）对COM结果进行了轨道和钟验证，结果表明，更新后的Galileo产品的质量与相应的GPS和GLONASS产品处于同一水平。在这些成就的基础上，CODE决定将伽利略系统纳入其IGS快速和超快速产品，并通过包括全球定位系统、全球轨道导航卫星系统和伽利略系统在内的三个系统解决方案，为IGS的第三次后处理工作做出贡献。(c)2020年空间研委会。由Elsevier Ltd.发布。这是CC BY-NC-ND许可证下的开放获取文章（http：creativecommons.org/licenses/ by-nc-nd/4.0/）。
We present an update on the multi-GNSS orbit and clock solution (COM), the CODE analysis center provides to the International GNSS service (IGS) in the frame of the multi-GNSS extension (MGEX). In recent years substantial progress was achieved in the fields of orbit modelling (Earth albedo, transmit antenna thrust, thermal radiation, eclipse attitude law), receiver and transmitter antenna calibration, ground tracking network, data dissemination, completeness of satellite constellations, availability of spacecraft-related meta information, observation biases, and ambiguity resolution. This led to improvements in orbit and clock parameter estimation, which are substantial for the European GNSS Galileo and are to a large part attributed to the availability of disclosed spacecraft meta data. Orbit and clock validation of the COM results using different validation methods (SLR residuals, orbit misclosures, linear fit of clock corrections) indicate that the quality of the updated Galileo products is meanwhile on the same level as for corresponding GPS and GLONASS products. Based on these achievements CODE decided to include Galileo in its IGS Rapid and Ultra-Rapid products and to contribute to the third reprocessing effort of the IGS with a three-system solution including GPS, GLONASS, and Galileo. (c) 2020 COSPAR. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/ by-nc-nd/4.0/).