Real-time carrier observation quality control algorithm for precision orbit determination of LEO satellites

Xiao, Gongwei; Liu, Genyou; Ou, Junfei; Zhou, Chongchong; Zhu, He; Chen, Runjing; Guo, Aizhi; Yang, Zhouming

doi:10.1007/s10291-022-01286-4

Cited by 9 publications

(1 citation statement)

References 29 publications

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“…a m is the acceleration caused by conservative forces and non-conservative forces, including gravity, perturbing acceleration, the non-spherical part of the gravitational attraction of the Earth, lunisolar gravitational perturbations, solar radiation pressure, and earth tide. Because the non-conservative forces are di cult to model accurately, it is necessary to use the empirical model parameters to absorb the empirical forces that cannot be modeled (Xiao et al 2022). Therefore, represents the empirical acceleration in radial (R), along-track (A), and cross-track (C), which is modeled by 3 rst-order Gauss-Markov processes to account for the unmodeled forces (Goldstein 2000;Wang 2015).…”

Section: Models and Parametersmentioning

confidence: 99%

GLONASS signal characteristics analysis and navigation performance for geostationary satellites

Wang

Shen²,

Tian³

et al. 2023

GPS Solut

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The utilization of Global Navigation Satellite System (GNSS) is becoming an attractive approach for autonomous navigation of the geostationary orbit (GEO) satellites. As one of the global navigation systems, the feasibility of using GLONASS in high orbit spacecraft has attracted attention. A receiver compatible with GLONASS has been mounted in the GEO satellites of TJS-2 and TJS-5 to demonstrate the ability of tracking signals and real-time orbit determination. In accordance with ight data, the GLONASS signal characteristics are analyzed, including the observations availability and distribution.When the side lobe signals are considered, the mean number of GLONASS satellites tracked increases from 1.8 to 5.8. The transmit power of each GLONASS satellite was estimated by using the C/N 0 measurements. Based on the in uence analysis results, we found that the side lobe signals transmit power plays an important role in increasing the number of observations. In particular, we investigate the characteristics, such as quantity, C/N 0 and Doppler, of the GLONASS antipodal satellites signals tracked simultaneously in the GEO scenario. We give the navigation performance assessment based on GLONASS-only ight data through comparisons with the precision reference orbits. For single-epoch least square solutions, the root mean squares (RMS) of position differences in radial, along-track, and crosstrack is 157.0, 29.5, and 21.5 m, respectively. The navigation accuracy is signi cantly improved when using the real-time orbit determination method and the RMS of position differences in radial, along-track, and cross-track is 5. 19, 8.98, and 3.15 m, respectively.

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Section: Models and Parametersmentioning

confidence: 99%