作者:Honglei Yang, Tianhe Xu, Wenfeng Nie, Zhenlong Fang, Min Li, Meiqian Guan

来源出版物:Measurement science and technology文献号:DOI:https://iopscience.iop.org/article/10.1088/1361-6501/abd1fe 出版年:online December2020

摘要:Precise orbit determination (POD) plays an important and fundamental role in Global Navigation Satellite Systems (GNSS) applications. The Russian GLONASS is a mature full-constellation GNSS system to provide both L-band and Satellite Laser Ranging (SLR) data now. To explore the individual GLONASS POD capability currently, we conduct the multi-day solution of the GLONASS L-band, SLR-only, and the combined L-band/SLR POD from September 1 to 30, 2019. Seven kinds of strategies are investigated to explore the impact of the multi-day solution strategy on the GLONASS SLR-only POD. For the L-band POD, we find that the 3-day solution is always optimal without the influence of the eclipse. The overall average root mean square (RMS) values are 3.7, 4.1, and 4.7 cm in the Radial-Tangential-Normal (RTN) directions by comparison with the Center for Orbit Determination in European (CODE) orbits. The corresponding RTN RMS are 1.2, 4.3, and 3.4 cm for the orbital overlaps. For the SLR-only POD, the 9-day solution is the best with the orbital overlaps RTN RMS values of 0.7, 4, and 5.7 cm. Meanwhile, the RTN RMS are 1.6, 8, and 14 cm with regard to the CODE orbits, which is obviously better than that of the L-band orbits in R-direction. Owing to the inaccuracy of the estimated dynamic parameters, the orbital consistency degrades with the increase of the multi-day solution arcs. Last but not least, a slight accuracy improvement can be achieved in the combined L-band/SLR POD, especially in the R-direction of the 1-day solution. As a typical case, the external consistency is improved by 0.4-1.2, -0.3-1.7, and 0.1-1.5 cm in RTN directions for the 3-day solution of the GLONASS R14 during Day of Year (DOY) 256-265, 2019.

Keywords: GLONASS, SLR, L-band, POD, Eclipse Period

Citations:Yanget al 2020 Meas. Sci. Technol. in presshttps://iopscience.iop.org/article/10.1088/1361-6501/abd1fe