GPS, Galileo, QZSS and IRNSS differential ISBs: estimation and application
GPS, Galileo, QZSS and IRNSS differential ISBs: estimation and application
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DOI：
10.1007/s10291-016-0536-y
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发表时间：
2017-04
期刊：
影响因子：
4.9
通讯作者：
D. Odijk;N. Nadarajah;S. Zaminpardaz;P. Teunissen
中科院分区：
文献类型：
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作者：
D. Odijk;N. Nadarajah;S. Zaminpardaz;P. Teunissen
了解系统间偏差（ISBs）对于以最佳方式组合多个全球和区域导航卫星系统（GNSS/RNSS）的观测结果至关重要。早期基于GPS、Galileo、BDS和QZSS的研究表明，当不同星座信号对应的差分isb （disb）以相同频率传输时，只需一个共同的枢轴卫星就足以解决该特定频率下的系统间模糊度时，可以提高多gnss实时运动定位的性能。最近，又发射了许多新的GNSS卫星。2016年初，有12颗伽利略IOV/FOC卫星和12颗GPS Block IIF卫星在轨运行，而印度区域导航卫星系统（IRNSS）发射了5颗卫星，其中4颗正在运行。未来几年还将有更多的发射计划。作为早期研究的延续，我们分析了与这些新卫星相对应的disb的大小和稳定性。对于IRNSS，本文首次提出了基于GPS、Galileo和QZSS的L5/E5a信号的混合接收机基线的disb。进一步证明，与为每个星座选择一个枢轴卫星的经典差分相比，当多个gnss观测数据都相对于一个共同的枢轴卫星进行差分时，单频（L5/E5a）模糊分辨率得到了极大的提高。
Knowledge of inter-system biases (ISBs) is essential to combine observations of multiple global and regional navigation satellite systems (GNSS/RNSS) in an optimal way. Earlier studies based on GPS, Galileo, BDS and QZSS have demonstrated that the performance of multi-GNSS real-time kinematic positioning is improved when the differential ISBs (DISBs) corresponding to signals of different constellations but transmitted at identical frequencies can be calibrated, such that only one common pivot satellite is sufficient for inter-system ambiguity resolution at that particular frequency. Recently, many new GNSS satellites have been launched. At the beginning of 2016, there were 12 Galileo IOV/FOC satellites and 12 GPS Block IIF satellites in orbit, while the Indian Regional Navigation Satellite System (IRNSS) had five satellites launched of which four are operational. More launches are scheduled for the coming years. As a continuation of the earlier studies, we analyze the magnitude and stability of the DISBs corresponding to these new satellites. For IRNSS this article presents for the first time DISBs with respect to the L5/E5a signals of GPS, Galileo and QZSS for a mixed-receiver baseline. It is furthermore demonstrated that single-frequency (L5/E5a) ambiguity resolution is tremendously improved when the multi-GNSS observations are all differenced with respect to a common pivot satellite, compared to classical differencing for which a pivot satellite is selected for each constellation.