Positioning accuracy assessment for the 4GEO/5IGSO/2MEO constellation of COMPASS

Zhou, Shanshi; Cao, Yue; Zhou, Ji; Hu, Xiaogong; Tang, Chengpan; Liu, Li; Guo, Rui; He, Feng; Chen, Junping; Wu, Bin

doi:10.1007/s11433-012-4942-z

Cited by 43 publications

(11 citation statements)

References 13 publications

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“…At present, the satellite C13 is no longer working and the constellation is consisted of five Geostationary Orbit (GEO), five Inclined Geosynchronous Orbit (IGSO) and three Medium altitude Earth Orbit (MEO) satellites. Concerning the performance of BDS signals, on board atomic frequency standards, as well as its contribution to the future GNSS systems, a wide range of valuable literatures has been published (Montenbruck et al 2010;Yang et al 2011;Hauschild et al 2012;Zhou et al 2012). More recently, based on the data/products (precise orbit and clock) generated with the Multi-GNSS Global Experiment (MGEX) ) and BDS Experimental Tracking Stations (BETS) (Shi et al 2012a), BDS has also been demonstrated as an efficient way to get reliable locations for both relative and standalone positioning throughout the Asia-Pacific region independently, and a few centimeter accuracy compared to GPS could be achieved (Shi et al 2012b;Gu et al 2013;Zhao et al 2013).…”

Section: Introductionmentioning

confidence: 99%

BeiDou phase bias estimation and its application in precise point positioning with triple-frequency observable

Lou

Shi

et al. 2015

J Geod

104

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At present, the BeiDou system (BDS) enables the practical application of triple-frequency observable in the Asia-Pacific region, of many possible benefits from the additional signal; this study focuses on exploiting the contribution of zero difference (ZD) ambiguity resolution (AR) to the precise point positioning (PPP). A general modeling strategy for multi-frequency PPP AR is presented, in which, the least squares ambiguity decorrelation adjustment (LAMBDA) method is employed in ambiguity fixing based on the full variance-covariance ambiguity matrix generated from the raw data processing model. Because of the reliable fixing of BDS L1 ambiguity faces more difficulty, the LAMBDA method with partial ambiguity fixing is proposed to enable the independent and instantaneous resolution of extra wide-lane (EWL) and wide-lane (WL). This mechanism of sequential ambiguity fixing is demonstrated for resolving ZD satellite phase bias and performing triplefrequency PPP AR with two reference station networks with a typical baseline of up to 400 and 800 km, respectively. Tests show that about 90 % of the EWL and WL phase bias of BDS has a consistency of better than 0.1 cycle, and this value decreases to <80 % for L1 phase bias for Experiment I, while all the solutions of Experiment II have a similar RMS of about 0.12 cycles. In addition, the repeatability of the daily mean phase bias agree to 0.093 cycles and 0.095 cycles for EWL and WL on average, which is much smaller than 0.20 cycles of L1. To assess the improvement of fixed PPP brought by applying the third frequency signal as well as the above phase bias, various ambiguity fixing strategy are considered in the numerical demonstration. It is shown that the impact of the additional signal is almost negligible when only float solution involved. It is also shown that by fixing EWL and WL together, as opposed to the single ambiguity fixing, will leads to an improvement in PPP accuracy by about 20.6 % on average. Attributed to the efficient resolution of EWL + WL within about 2 min in Experiment I, the 0.5 m level positioning can be achieved in 10 min for both horizontal and vertical, compared to 50 min for horizontal and 30 min for vertical by the NONE/EWL/WL fixed solution. While, for Experiment II, the improvement in the convergence can only be seen for the horizontal as the TTFF takes about 40 min for EWL and WL to be resolved.

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Section: Introductionmentioning

confidence: 99%

BeiDou phase bias estimation and its application in precise point positioning with triple-frequency observable

Lou

Shi

et al. 2015

J Geod

104

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“…For navigation satellites, the error in the radial direction contributes most to the orbit-only signal-in-space range error (SISRE). Following Zhou et al (2012), the orbit-only SISRE equation used for IGSO is …”

Section: Comparison Of Orbit Determination Resultsmentioning

confidence: 99%

Globalization highlight: orbit determination using BeiDou inter-satellite ranging measurements

Yang

Li³

et al. 2017

GPS Solut

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The BeiDou Navigation Satellite System is expected to provide a global positioning and navigation service by 2020. To achieve this goal, the new-generation navigation satellites that have been launched since March 2015 are equipped with inter-satellite links (ISLs), with the objective of testing new navigation signals and the ISLs themselves. Using these new-generation navigation satellites and several ground facilities in China, a combined orbit determination experiment was carried out during August 2016. The orbit mechanical model, orbit determination method, and accuracy evaluation method used in this experiment are presented here. The accuracy of the combined orbit determination method is evaluated, and the performance-related improvements resulting from the ISLs are analyzed. The performance of orbit determination has been increased about 37-76% for different satellites in orbit-only signal-in-space range error (orbit-only SISRE).

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“…Users can obtain PNT service by receiving any branch signal and navigation message, and the service mode of single, dual, or triple frequency can be chosen by users. Since BDS‐2 was officially put into full operation in 2012, its navigation signal measurement accuracy, satellite orbit and clock correction performance, positioning accuracy, and timing accuracy have been fully verified . Under normal circumstances, the radial accuracy of the broadcast ephemeris of BDS‐2 satellites is better than 0.5 m, the precision of the ephemeris of the IGSO and MEO satellites is better than 10 cm, and the precision of the ephemeris of the GEO satellites is better than 50 cm .…”

Section: Introductionmentioning

confidence: 99%

Improved design of control segment in BDS‐3

et al. 2019

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The Chinese BeiDou Navigation Satellite System (BDS) is accelerating its development and has been applied in various fields. Compared with other satellite navigation systems in the world, BDS has many unique features such as multiservices integrated with Radio Determination Satellite Service (RDSS), Radio Navigation Satellite Service (RNSS), and Satellite-Based Augmentation Service (SBAS), a mixed-orbit satellite constellation, and flexible navigation messages, etc. This paper presents the distinctive innovative designs as well as processing strategies in BDS. First, this paper introduces the characteristics of BeiDou navigation messages broadcast by the hybrid constellation of satellites in Geostationary Earth Orbit (GEO), Inclined Geo-Synchronization Orbit (IGSO), and Medium Earth Orbit (MEO). Next, the innovative design and operation of the control segment are discussed. Finally, highlights of the unique usage algorithm of the BDS navigation message information are presented, such as the BDS satellite clock correction and TGD parameters, satellite ephemeris and almanac, and ionospheric delay parameters.

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Positioning accuracy assessment for the 4GEO/5IGSO/2MEO constellation of COMPASS

Cited by 43 publications

References 13 publications

BeiDou phase bias estimation and its application in precise point positioning with triple-frequency observable

BeiDou phase bias estimation and its application in precise point positioning with triple-frequency observable

Globalization highlight: orbit determination using BeiDou inter-satellite ranging measurements

Improved design of control segment in BDS‐3

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