Analysis of Performance of the Satellite Orbit Fault Detection Method Using Inter-Satellite Link (ISL) Range Measurement and Trigonometry Law

JinHyeok Jang, SangHoon Koo, Jung Min Joo, Moon Beom Heo, SangKyung Sung, Gyu-In Jee, and Young Jae Lee

Abstract:	Satellite coordinates are critical information in calculating the user’s location on the Global Navigation Satellite System (GNSS). This system estimates coordinates using ephemeris. Ephemeris is a value generated through satellite orbit estimation and does not indicate current satellite coordinates. When an unexpected problem or ephemeris modify problem occurs in the satellite operation, this results in a considerable error for the user. Ground reference stations apply a monitoring technique to prevent this problem. However, the current existing technique uses ground measurement estimated from ground reference stations, which inevitably incurs various errors. Error estimation can eliminate such errors, but in turn, this technique entails possible estimation error. As a result, the performance of this error detection technique decreases. Ground reference stations use distance values to detect satellite faults from the ground. This can also potentially reduce the detection performance as detection is dependent on geometrical arrangement and the direction of satellite faults. To resolve these two problems, the present study proposes a satellite orbit fault detection method using the Inter-Satellite Link (ISL) and the trigonometry law. We calculated test statistic and analyzed the sensitivity of our new method. Based on this, we identified the characteristics of our method. We calculated threshold and Minimum Detectable Error (MDE) based on statistical theories. Calculated values were tested through simulation. Finally, the performance of our method was confirmed through a quantitative comparison of sensitivity and MDE between the existing technique and our method.
Published in:	Proceedings of the 31st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2018) September 24 - 28, 2018 Hyatt Regency Miami Miami, Florida
Pages:	1169 - 1179
Cite this article:	Jang, JinHyeok, Koo, SangHoon, Joo, Jung Min, Heo, Moon Beom, Sung, SangKyung, Jee, Gyu-In, Lee, Young Jae, "Analysis of Performance of the Satellite Orbit Fault Detection Method Using Inter-Satellite Link (ISL) Range Measurement and Trigonometry Law," Proceedings of the 31st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2018), Miami, Florida, September 2018, pp. 1169-1179. https://doi.org/10.33012/2018.16113
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