GLONASS pseudorange inter-channel biases considerations when jointly estimating GPS and GLONASS clock offset

Chen, Yongchang; Yuan, Yunbin; Ding, Wenwu; Zhang, Baocheng; Liu, Teng

doi:10.1007/s10291-017-0630-9

Cited by 16 publications

(8 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, the RMS of IGS03 was 9.38 ns, and even higher for R10 (26 ns). The reason may be that GLONASS adopts FDMA and different ACs adopt different strategies in dealing with pseudo-range IFB in resolving clock corrections [34,35]. In addition, the GLONASS product from CAS01 is calculated by the Institute of Geodesy and Geophysics and broadcasted by the Academy of Opto-Electronics.…”

Section: Validation Results Of Glonass Real-time Orbit and Clock Prodmentioning

confidence: 99%

Assessment of Multiple GNSS Real-Time SSR Products from Different Analysis Centers

Wang

et al. 2018

IJGI

View full text Add to dashboard Cite

The real-time State Space Representation (SSR) product of the GNSS (Global Navigation Satellite System) orbit and clock is one of the most essential corrections for real-time precise point positioning (PPP). In this work, the performance of current SSR products from eight analysis centers were assessed by comparing it with the final product and the accuracy of real-time PPP. Numerical results showed that (1) the accuracies of the GPS SSR product were better than 8 cm for the satellite orbit and 0.3 ns for the satellite clock; (2) the accuracies of the GLONASS (GLObalnaya NAvigatsionnaya Sputnikovaya Sistema) SSR product were better than 10 cm for orbit RMS (Root Mean Square) and 0.6 ns for clock STD (Standard Deviation); and (3) the accuracies of the BDS (BeiDou Navigation Satellite System) and Galileo SSR products from CLK93 were about 14.54 and 4.42 cm for the orbit RMS and 0.32 and 0.18 ns for the clock STD, respectively. The simulated kinematic PPP results obtained using the SSR products from CLK93 and CLK51 performed better than those using other SSR products; and the accuracy of PPP based on all products was better than 6 and 10 cm in the horizontal and vertical directions, respectively. The real-time kinematic PPP experiment carried out in Beijing, Tianjin, and Shijiazhuang, China indicated that the SSR product CLK93 from Centre National d'Etudes Spatiales (CNES) had a better performance than CAS01. Moreover, the PPP with GPS + BDS dual systems had a higher accuracy than those with only a GPS single system.

show abstract

Section: Validation Results Of Glonass Real-time Orbit and Clock Prodmentioning

confidence: 99%

Assessment of Multiple GNSS Real-Time SSR Products from Different Analysis Centers

Wang

et al. 2018

IJGI

View full text Add to dashboard Cite

show abstract

“…In order to fix the ambiguities [ 32 , 33 ] and achieve fast convergence of the fix algorithm, we decided to use both the GPS and GLONASS constellations. We recall here that using both constellations to correct ambiguities exposes the computational algorithm to some known problems caused by GLONASS inter-channel bias [ 34 , 35 ]. One strategy to overcome this problem is to use receivers of the same brand and model for both the Master and Rover roles ( , accessed on 26 October 2022).…”

Section: Applications Of the Lzer0 Platformmentioning

confidence: 99%

LZER0: A Cost-Effective Multi-Purpose GNSS Platform

Zuliani

Tunini

Severin³

et al. 2022

Sensors

View full text Add to dashboard Cite

Recent advances in Global Navigation Satellite System (GNSS) technology have made low-cost sensors available to the mass market, opening up new opportunities for real-time ground deformation and structure monitoring. In this paper, we present a new product developed in this framework by the National Institute of Oceanography and Applied Geophysics–OGS in collaboration with a private company (SoluTOP SAS): a cost-effective, multi-purpose GNSS platform called LZER0, suitable not only for surveying measurements, but also for monitoring tasks. The LZER0 platform is a complete system that includes the GNSS equipment (M8T single-frequency model produced by u-blox) and the web portal where the results are displayed. The GNSS data are processed using the RTKLIB software package, and the processed results are made available to the end user. The relative positioning mode was adopted both with real-time and post-processing RTKLIB engines. We present three applications of LZER0—cadastral, monitoring, and automotive—which demonstrate that it is a flexible, multi-purpose platform that is easy to use in terms of both hardware and software, and can be easily deployed to perform various tasks in the research, educational, or professional sectors.

show abstract

“…Different from reducing the parameters to be estimated by difference, an undifferenced estimation method that combines full-parameter and high-rate models to reduce the number of ambiguities to be estimated is proposed [8]. In addition to estimating high-rate satellite clocks, many studies have focused on multi-global navigation satellite system (GNSS) clock estimation [9][10][11] and the evaluation of satellite clock offset accuracy and reliability [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

A Method to Accelerate the Convergence of Satellite Clock Offset Estimation Considering the Time-Varying Code Biases

Liu

Yuan

2021

Remote Sensing

Self Cite

View full text Add to dashboard Cite

Continuous and stable precision satellite clock offsets are an important guarantee for real-time precise point positioning (PPP). However, in real-time PPP, the estimation of a satellite clock is often interrupted for various reasons such as network fluctuations, which leads to a long time for clocks to converge again. Typically, code biases are assumed to stay constant over time in clock estimation according to the current literature. In this contribution, it is shown that this assumption reduces the convergence speed of estimation, and the satellite clocks are still unstable for several hours after convergence. For this reason, we study the influence of different code bias extraction schemes, that is, taking code biases as constants, extracting satellite code biases (SCBs), extracting receiver code biases (RCBs) and simultaneously extracting SCBs and RCBs, on satellite clock estimation. Results show that, the time-varying SCBs are the main factors leading to the instability of satellite clocks, and considering SCBs in the estimation can significantly accelerate the filter convergence and improve the stability of clocks. Then, the products generated by introducing SCBs in the clock estimation based on undifferenced observations are applied to PPP experiments. Compared with the original undifferenced model, clocks estimated using the new method can significantly accelerate the convergence speed of PPP and improve the positioning accuracy, which illustrates that our estimated clocks are effective and superior.

show abstract

GLONASS pseudorange inter-channel biases considerations when jointly estimating GPS and GLONASS clock offset

Cited by 16 publications

References 18 publications

Assessment of Multiple GNSS Real-Time SSR Products from Different Analysis Centers

Assessment of Multiple GNSS Real-Time SSR Products from Different Analysis Centers

LZER0: A Cost-Effective Multi-Purpose GNSS Platform

A Method to Accelerate the Convergence of Satellite Clock Offset Estimation Considering the Time-Varying Code Biases

Contact Info

Product

Resources

About