Establishment criteria, routing algorithms and probability of use of inter-satellite links in mixed navigation constellations

Han, Shuai; Gui, Qiang; Li, Jianwen

doi:10.1016/j.asr.2012.12.020

Cited by 21 publications

(6 citation statements)

References 14 publications

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“…Alongside purely geometric or sequential links, algorithms have already been studied to maximize network connectivity and augment the overall network performance (Shi et al 2011;Yi et al 2013). The criteria of link establishment and their properties must be investigated to create valuable connections for orbit determination purposes (Han et al 2013). Shi et al (2011) proposed establishing ISLs in the frame of topology processing.…”

Section: Connectivity Schemesmentioning

confidence: 99%

“…To solve this problem, sub-constellations are usually created, e.g. links are established between 3 GEO satellites + 3 IGSO satellites (Han et al 2013). We believe that results of this research can be used to help select the appropriate connectivity scheme for operational ISL hardware in future generations of navigation constellations.…”

Section: Introductionmentioning

confidence: 97%

“…The investigation was continued in the second project, labelled "ADVISE" for further simplification of the technology and the system architecture. Both projects assumed the adaptation of the orbit and clock determination algorithms with respect to classical implementations (Fernández 2011;Han et al 2013). According to a statement published on the ESA webpage (https ://www.esa.int/ Enabl ing_Suppo rt/Space _Engin eerin g_Techn ology /Shapi ng_the_Futur e/Optic al_inter -satel lite_links _are_best_tech_for_Galil eo), demonstration flight and verification of the ISLs on board a Galileo 2nd Generation spacecraft is planned in 2021.…”

Section: Introductionmentioning

confidence: 99%

“…The role of the connectivity scheme becomes even more important in the case of mixed constellation configurations of geostationary orbit (GEO), inclined geostationary orbit (IGSO), and medium earth orbit (MEO) satellites. Such a configuration already exists in BDS (Han et al 2013); however, the long transmission distance between GEO and MEO or IGSO and MEO might cause some difficulties (Yi et al 2013). To solve this problem, sub-constellations are usually created, e.g.…”

Section: Introductionmentioning

confidence: 99%

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The application of inter-satellite links connectivity schemes in various satellite navigation systems for orbit and clock corrections determination: simulation study

2020

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Inter-Satellite Links (ISLs) are intended to improve precision of orbit determination and satellite clock estimation. The ISLs provide a precise pseudorange measurements between satellites in a specific constellation. The study is a preparatory assessment of exploitation of seven connectivity schemes in the terms of the precise orbit determination for three types of constellations—Galileo-like with 24 satellites on three orbital planes, GPS-like with 24 satellites on six orbital planes, and GPS with real positions. The first part of the study focused on detailed analysis of the various ISL connectivity schemes, considering the geometry of ISL observations. The selected results of ranging were examined in the context of the precise orbit determination based on weighted least squares adjustment. The second part of the analysis was based on simulated measurements with two approaches. First approach focuses on geometrical dependencies and the second is performed with ISL measurement biases estimation. It was found that the use of the ISL technique with GNSS measurements in orbit determination improves the results by reducing the RMS error in the along-track and cross-track components. Choice of connectivity schemes does not have a significant impact on the total results of orbit determination, but give different contribution to particular components. Introducing constant bias in ISL measurements occurs in slightly worse estimation results. However, the relations between connectivity schemes is very similar to approach without simulation of ISL bias, the differences are at the level of 10%. Satellite and station clock estimation errors are almost equal for all used connectivity schemes. Results of clocks are also not influenced by ISL bias. This study showed that the ISL technique is a highly promising addition for future generations of satellite navigation systems and that sequential and ring connectivity schemes can be recommended for use in future navigation constellations.

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