An enhanced calibration method of GLONASS inter-channel bias for GNSS RTK

Al-Shaery, A.; Zhang, Shaocheng; Rizos, Chris

doi:10.1007/s10291-012-0269-5

Cited by 87 publications

(45 citation statements)

References 5 publications

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“…for base and rover station) to fix the ambiguity resolution [17], as the different types of receivers have inter-frequency bias (IFB) which cannot be eliminated by Double Differencing (DD) process. Grelier, Ghion, Dantepal, Ries, DeLatour, Issler, AvilaRodriguez, Wallner and Hein [18] demonstrated the improvement in the geometry, which is described by the Positional Dilution of Precision (PDOP), when the constellation of GPS is combined with BeiDou and/or Galileo.…”

Section: Introductionmentioning

confidence: 99%

Investigating multi-GNSS performance in the UK and China based on a zero-baseline measurement approach

et al. 2017

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GPS is the positioning tool of choice for a wide variety of applications where accurate (cm level or less) positions are required. However GPS is susceptible to a variety of errors that degrade both the quality of the position solution and the availability of these solutions.The contribution of additional observations from other GNSS systems may improve the quality of the positioning solution. This study investigates the contribution of the GLONASS and BeiDou systems and the potential improvement to the precision achieved compared to positioning using GPS only measurements. Furthermore, it is investigated whether the combination of the satellite systems can limit the noise level of the GPS-only solution. A series of zero-baseline measurements, of 1Hz sampling rate, were recorded with different types of pairs of receivers over 12 consecutive days in the UK and in China simultaneously.The novel part in this study is comparing the simultaneous GNSS real measurements recorded in the UK and China. Moreover, the correlation between the geometry and positional precision was investigated.The results indicate an improvement in a multi-GNSS combined solution compared to the GPS-only solution, especially when the GPS-only solution derives from weak satellite geometry, or the GPS-only solution is not available. Furthermore, all the outliers due to poor satellite coverage with the individual solutions are limited and their precision is improved, agreeing also with the improvement in the mean of the GDOP, i.e. the mean GDOP was improved from 3.0 for the GPS only solution to 1.8 for the combined solution.However, the combined positioning did not show significant positional improvement when GPS has a good geometry and availability.2

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Section: Introductionmentioning

confidence: 99%

Investigating multi-GNSS performance in the UK and China based on a zero-baseline measurement approach

et al. 2017

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“…GLO-NASS satellites operate using frequency division multiple access (FDMA), and the wavelength varies from satellite to satellite. The resulting interchannel bias is negligible when using like receivers, as in this model [24]. Because of this, double differences were only formed within each satellite constellation (i.e., GPS and GLONASS) and a different reference satellite was identified for each.…”

Section: Antenna Baselinementioning

confidence: 99%

Performance Trades for Multiantenna GNSS Multisensor Attitude Determination Systems

Tehrani

Gross

2018

International Journal of Aerospace Engineering

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We present various performance trades for multiantenna global navigation satellite system (GNSS) multisensor attitude estimation systems. In particular, attitude estimation performance sensitivity to various error sources and system configurations is assessed. This study is motivated by the need for system designers, scientists, and engineers of airborne astronomical and remote sensing platforms to better determine which system configuration is most suitable for their specific application. In order to assess performance trade-offs, the attitude estimation performance of various approaches is tested using a simulation that is based on a stratospheric balloon platform. For GNSS errors, attention is focused on multipath, receiver measurement noise, and carrierphase breaks. For the remaining attitude sensors, different performance grades of sensors are assessed. Through a Monte Carlo simulation, it is shown that, under typical conditions, sub-0.1-degree attitude accuracy is available when using multiple antenna GNSS data only, but that this accuracy can degrade to degree level in some environments warranting the inclusion of additional attitude sensors to maintain the desired level of accuracy. Further, we show that integrating inertial sensors is more valuable whenever accurate pitch and roll estimates are critical.

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“…Unlike GPS, the GLONASS carrier phase and pseudorange observations suffer from different frequencies and inter-frequency biases due to the signal structure of GLONASS, which is based on the frequency division multipath access technique [18]. Many studies have investigated the feature of inter-frequency phase biases (IFPBs) and indicated that a liner function of the frequency number can be employed to model the IFPBs [19,20]. Moreover, several studies investigated the characteristics of inter-frequency code biases (IFCBs) and demonstrated that IFCBs were dependent on receiver types, antenna types, domes and firmware versions [21,22].…”

Section: Introductionmentioning

confidence: 99%

Consideration of GLONASS Inter-Frequency Code Biases in Precise Point Positioning (PPP) International Time Transfer

Qin

Cao

et al. 2018

Applied Sciences

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Abstract:International time transfer based on Global Navigation Satellite System (GLONASS) precise point positioning (PPP) is influenced by inter-frequency code biases (IFCBs) because of the application of frequency division multiple access technique. This work seeks to gain insight into the influence of GLONASS IFCBs on international time transfer based on GLONASS-only PPP. With a re-parameterization process, three IFCB handling schemes are proposed: neglecting IFCBs, estimating IFCB for each GLONASS frequency number, and estimating IFCB for each GLONASS satellite. Observation data collected from 39 globally distributed stations in a 71-day period (DOY 227-297, 2017) was exclusively processed. For the comparison reason, Global Positioning System (GPS)-only PPP solutions were regarded as reference values. The clock differences derived from GPS-and GLONASS-only PPP solutions were then analyzed. The experimental results demonstrated that considering GLONASS IFCBs could reduce standard deviation (STD) of the clock differences for both identical receiver types and mixed receiver types, of which reduction was from 3.3% to 62.6%. Furthermore, compared with neglecting IFCBs, STD of the clock differences with estimating IFCB for each GLONASS satellite in coordinate-fixed mode was reduced by more than 30% from 0.30 to 0.20 ns, and by 10% from 0.40 to 0.35 ns, for 1-day arc solutions and 10-day arc solutions, respectively. Moreover, different precise products from three International GNSS Service (IGS) analysis centers were also evaluated. Even though different IFCB handling schemes were adopted in GLONASS satellite clock estimation, our numerical results showed that international time transfer on the basis of estimating IFCB for each GLONASS satellite better than the other two processing schemes. To achieve high-precision GLONASS-only PPP-based international time transfer, it is highly recommended to estimate IFCB for each GLONASS satellite.

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An enhanced calibration method of GLONASS inter-channel bias for GNSS RTK

Cited by 87 publications

References 5 publications

Investigating multi-GNSS performance in the UK and China based on a zero-baseline measurement approach

Investigating multi-GNSS performance in the UK and China based on a zero-baseline measurement approach

Performance Trades for Multiantenna GNSS Multisensor Attitude Determination Systems

Consideration of GLONASS Inter-Frequency Code Biases in Precise Point Positioning (PPP) International Time Transfer

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