Evaluation of Positioning Performance for RTK-GPS/GLONASS with Calibrated Inter-channel Hardware Biases

Yamada, Hideki; Takasu, Tomoji; Kubo, Nobuaki; Yasuda, Akio

doi:10.9749/jin.124.103

Cited by 4 publications

(8 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With respect to the GLONASS system, the DISB has an apparent linear relationship with the receiver pair JAVAD-TRIMBLE and SEPTENTRIO-TRIMBLE. In the study of Yamada et al (2010), the code inter-channel bias of the L1 band also shows similar phenomena for the receiver pair NOVATEL-TRIMBLE, NOVATEL-JAVAD and NOVATEL-TOPCON. We propose using Equation (7) in DGNSS positioning including the GLONASS system for receiver pairs showing similar characteristics.…”

Section: New Combined Dgnss Model and Positioning Resultsmentioning

confidence: 52%

“…In general, the receiving equipment of the same type experiences similar inter-channel biases, which can be removed to a large extent in the differential mode (Zinoviev 2005). However, as more and more manufacturers have entered the GPS/GLONASS receiver market, GLONASS receivers from different manufacturers today show large differences in their inter-channel biases (Wanninger 2012; Yamada et al, 2010). Therefore, Equation (5) similarly presents the observational formula of GLONASS for a rover segment, where r refers to a particular GLONASS satellite, and k denotes the channel number.…”

Section: Methods Of Evaluating the Isb In The Dgnss Modelmentioning

confidence: 99%

“…The number of satellites in the other three systems was greater than five in this period of time. One GLONASS DISB parameter was estimated because the receiver equipment of the same type had experienced similar inter-channel biases (Zinoviev 2005; Yamada et al, 2010).…”

Section: Analysis Of Disb Characteristicsmentioning

confidence: 99%

See 2 more Smart Citations

Accounting for Inter-System Bias in DGNSS Positioning with GPS/GLONASS/BDS/Galileo

Liu

Shu

et al. 2017

J. Navigation

View full text Add to dashboard Cite

Code Differential Global Positioning System (DGPS) is widely used in satellite navigation and positioning because of its simple algorithm and preferable precision. Multi-Global Navigation Satellite System (GNSS) is expected to enhance the accuracy, reliability and availability of Differential GNSS (DGNSS) positioning. Traditional DGNSS models should set separate clock parameters due to the clock differences between the different systems. Awareness of the Inter-System Bias (ISB) could help to maximise the redundancy of the positioning model, thus improving the performance of multi-GNSS positioning. This paper aims to examine the inter-system bias of GPS/GLONASS/BeiDou (BDS)/Galileo and their benefits in DGNSS positioning. Results show that Differential ISB (DISB) characteristics vary with different receiver types and systems. The size of DISB could reach metre-level and the precision of estimated DISBs can reach approximately several centimetres within tens of epochs. Therefore, a new real-time DGNSS model that accounts for ISB is proposed. After differential ISBs are initialised, positioning with four satellites from arbitrarily the same or different systems can be realised. Moreover, compared with the traditional DGNSS model, the precision of the positioning results with the new model are obviously improved, especially in harsh environments.

show abstract

Section: New Combined Dgnss Model and Positioning Resultsmentioning

confidence: 52%

Section: Methods Of Evaluating the Isb In The Dgnss Modelmentioning

confidence: 99%

See 1 more Smart Citation

Accounting for Inter-System Bias in DGNSS Positioning with GPS/GLONASS/BDS/Galileo

Liu

Shu

et al. 2017

J. Navigation

View full text Add to dashboard Cite

show abstract

“…However, given that the GLONASS system adopts the signal pattern of frequency division multiple access, the inter-frequency code bias (IFCBs) and the inter-frequency carrier phase bias (IFPB) will affect the MW combination observations and will further influence the wide-lane ambiguity fixing. Scholars have comprehensively studied the characteristic of inter-frequency bias and its influence on GLONASS ambiguity fixing 17 18 19 20 21 22 . Their results show that the IFPB is mainly related to the receiver type and has a linear relation with frequency.…”

mentioning

confidence: 99%

“…Residual error can be reduced to a few millimeters after calibration and has hardly influence on wide-lane ambiguity fixing. However, no obvious linear relationship exists between the IFCBs and the frequency; hence, no unified and effective correction model is known 18 23 24 25 26 . Reussner and Wanninger indicated that IFCBs are difficult to correct.…”

mentioning

confidence: 99%

A method of undifferenced ambiguity resolution for GPS+GLONASS precise point positioning

Song

Lou

et al. 2016

Sci Rep

View full text Add to dashboard Cite

Integer ambiguity resolution is critical for achieving positions of high precision and for shortening the convergence time of precise point positioning (PPP). However, GLONASS adopts the signal processing technology of frequency division multiple access and results in inter-frequency code biases (IFCBs), which are currently difficult to correct. This bias makes the methods proposed for GPS ambiguity fixing unsuitable for GLONASS. To realize undifferenced GLONASS ambiguity fixing, we propose an undifferenced ambiguity resolution method for GPS+GLONASS PPP, which considers the IFCBs estimation. The experimental result demonstrates that the success rate of GLONASS ambiguity fixing can reach 75% through the proposed method. Compared with the ambiguity float solutions, the positioning accuracies of ambiguity-fixed solutions of GLONASS-only PPP are increased by 12.2%, 20.9%, and 10.3%, and that of the GPS+GLONASS PPP by 13.0%, 35.2%, and 14.1% in the North, East and Up directions, respectively.

show abstract

A single difference-based multi-GNSS inter-system model with consideration of inter-frequency bias and inter-system bias

Shang¹,

Gao²,

Gao³

et al. 2020

Meas. Sci. Technol.

View full text Add to dashboard Cite

By calibrating the inter-system bias (ISB), an inter-system model can be achieved to improve the performance of multi-global navigation satellite system (GNSS) positioning. A number of studies were carried out to compose inter-system models among code division multiple access (CDMA) systems. However, due to the frequency division multiple access (FDMA) technique, GLONASS phase and code observations suffer from inter-frequency phase bias (IFPB) and inter-frequency code bias (IFCB) respectively, which make it difficult to obtain the ISB among GLONASS and CDMA systems. In addition, most of the current inter-system models are unable to handle mixed frequencies. A new single difference-based uniform inter-system model suitable for all of the CDMA and FDMA frequency combinations is proposed in this study. We first utilize a particle filter approach to extract the IFPB rate. Afterwards, the multi-ISB parameters can be estimated by the proposed model simultaneously. Four short baselines containing the signals of GLONASS, GPS, BDS3, BDS2, Galileo, and QZSS are selected to validate the model. The quantitative results indicate that the IFPB rate can be extracted precisely by a particle filter within ten epochs. The inter-system phase bias valuations are sufficiently stable on a daily scale and have standard deviation near 0.01 cycles. After de-weighting the GLONASS code observations to reduce the influence of IFCB, the inter-system code bias is also stable. Furthermore, imposing the stable ISB on the multi-GNSS inter-system model can effectively improve the single-frequency real-time kinematic positioning accuracy and reliability for severely obstructed situations with only a small number of satellites observed.

show abstract

Evaluation of Positioning Performance for RTK-GPS/GLONASS with Calibrated Inter-channel Hardware Biases

Cited by 4 publications

References 2 publications

Accounting for Inter-System Bias in DGNSS Positioning with GPS/GLONASS/BDS/Galileo

Accounting for Inter-System Bias in DGNSS Positioning with GPS/GLONASS/BDS/Galileo

A method of undifferenced ambiguity resolution for GPS+GLONASS precise point positioning

A single difference-based multi-GNSS inter-system model with consideration of inter-frequency bias and inter-system bias

Contact Info

Product

Resources

About