Characterization of Compass M-1 signals

Hauschild, André; Montenbruck, Oliver; Sleewaegen, Jean-Marie; Huisman, Lennard; Teunissen, Peter

doi:10.1007/s10291-011-0210-3

Cited by 137 publications

(76 citation statements)

References 7 publications

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“…Furthermore, it was also confirmed that the carrier to noise density ratio (C/N0) for BDS-IGSO and GEO satellites, which are characterised by a much higher altitude, is 3-4 dB-Hz lower than common BDS-MEO satellites [45,46]. Thus, the starting point of the investigations given in this section is the analysis of the carrier to noise density ratio for E14 and E18 satellites registered at different altitudes.…”

Section: Signal Powersupporting

confidence: 52%

On the Applicability of Galileo FOC Satellites with Incorrect Highly Eccentric Orbits: An Evaluation of Instantaneous Medium-Range Positioning

2018

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This study addresses the potential contribution of the first pair of Galileo FOC satellites sent into incorrect highly eccentric orbits for geodetic and surveying applications. We began with an analysis of the carrier to noise density ratio and the stochastic properties of GNSS measurements. The investigations revealed that the signal power of E14 & E18 satellites is higher than for regular Galileo satellites, what is related to their lower altitude over the experiment area. With regard to the noise of the observables, there are no significant differences between all Galileo satellites. Furthermore, the study confirmed that the precision of Galileo data is higher than that of GPS, especially in the case of code measurements. Next analysis considered selected domains of precise instantaneous medium-range positioning: ambiguity resolution and coordinate accuracy as well as observable residuals. On the basis of test solutions, with and without E14 & E18 data, we found that these satellites did not noticeably influence the ambiguity resolution process. The discrepancy in ambiguity success rate between test solutions did not exceed 2%. The differences between standard deviations of the fixed coordinates did not exceed 1 mm for horizontal components. The standard deviation of the L1/E1 phase residuals, corresponding to regular GPS and Galileo, and E14 & E18 satellite signals, was at a comparable level, in the range of 6.5-8.7 mm. The study revealed that the Galileo satellites with incorrect orbits were fully usable in most geodetic, surveying and many other post-processed applications and may be beneficial especially for positioning during obstructed visibility of satellites. This claim holds true when providing precise ephemeris of satellites.

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Section: Signal Powersupporting

confidence: 52%

On the Applicability of Galileo FOC Satellites with Incorrect Highly Eccentric Orbits: An Evaluation of Instantaneous Medium-Range Positioning

2018

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“…(17) with the values given in Table 1, and using the maximum values of SNR, which are usually reached close to zenith. It is worth noting here that BeiDou signals have high carrier-to-noise density ratios, which exceed the values for the signals of other constellations such as GPS and Galileo on the corresponding frequency bands [8]. In our test, SNR of BeiDou signals reached a maximum of 56 dBHz.…”

Section: Characterization Of the Stochastic Properties Of The Signalsmentioning

confidence: 57%

“…(3-4), and thus will not a ect T LOM or w−statistic, instability of the clocks will show up due to disturbance in the observations and their predicted values computed through the dynamic model. The clock of satellite PRN C30, the rst-launched MEO satellite (known as M1), was reported earlier by [8] to experience some problems. This was con rmed by our data analysis.…”

Section: Monitoring and Analysis Of Data Validation Parametersmentioning

confidence: 99%

Validation of BeiDou Observations

El‐Mowafy

2014

Journal of Applied Geodesy

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This study presents validation of BeiDou measurements in un-di erenced standalone mode and experimental results of its application for real data. A reparameterized form of the unknowns in a geometry-free observation model was used. Observations from each satellite are independently screened using a local modeling approach. Main advantages include that there is no need for computation of inter-system biases and no satellite navigation information are needed. Validation of the triple-frequency BeiDou data was performed in static and kinematic modes, the former at two continuously operating reference stations in Australia using data that span two consecutive days and the later in a walking mode for three hours. The use of the validation method parameters for numerical and graphical diagnostics of the multi-frequency BeiDou observations are discussed. The precision of the system's observations was estimated using an empirical method that utilizes the characteristics of the validation statistics. The capability of the proposed method is demonstrated in detection and identi cation of arti cial errors inserted in the static BeiDou data and when implemented in a single point positioning processing of the kinematic test.

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“…A method has been presented to design optimal parameter sets for all these three types of satellites (Fu and Wu 2011). The clock offset was estimated by processing the BDS M1 observations based on the orbit solution from laser ranging measurements (Hauschild et al 2012). Unexpectedly high dynamics in the clock results were found, which affect both the pseudo-range and carrier phase measurements.…”

Section: Introductionmentioning

confidence: 99%

Accuracy analysis of GPS/BDS relative positioning using zero-baseline measurements

Roberts

Tang

2018

J. Glob. Position. Syst.

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This paper focuses on assessing the precision of carrier phase relative positioning using GPS-only, BDS-only and GPS/BDS measurements. A zero baseline is used in order to achieve this. Software for GPS and BDS processing has been developed, allowing static and kinematic data processing, as well as the combined GPS and BDS processing. Ionospheric and tropospheric delays are significantly reduced by double differencing between satellites and receivers, but the Multipath signals are still a major source of error for the various general GNSS baseline applications. In this paper, two Multi-GNSS receivers are connected to one antenna by an antenna splitter. This strategy results in all the delays or errors being mitigated, leaving only the random measurement noises resulted from the double difference processing. The time series of the final baseline error reveal that both GPS and BDS can achieve a precision of millimetres, but GPS performs better than BDS. Results from the combined processing of GPS and BDS demonstrate that the integration of GPS and BDS can significantly improve the precision, compared with the GPS-only and BDS-only results.

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Characterization of Compass M-1 signals

Cited by 137 publications

References 7 publications

On the Applicability of Galileo FOC Satellites with Incorrect Highly Eccentric Orbits: An Evaluation of Instantaneous Medium-Range Positioning

On the Applicability of Galileo FOC Satellites with Incorrect Highly Eccentric Orbits: An Evaluation of Instantaneous Medium-Range Positioning

Validation of BeiDou Observations

Accuracy analysis of GPS/BDS relative positioning using zero-baseline measurements

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