BeiDou Inter-Satellite-Type Bias Evaluation and Calibration for Mixed Receiver Attitude Determination

Nadarajah, Nandakumaran; Teunissen, Peter; Raziq, Noor

doi:10.3390/s130709435

Cited by 55 publications

(35 citation statements)

References 42 publications

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“…Thus, the remaining error of the GNSS solution is due to the geometry of the satellite constellations and the noise of the GNSS receiver [24]. Furthermore, potential impact of BeiDou inter-satellite-type biases (ISTBs) between different types of BeiDou satellites occurs in case of using different GNSS receivers, affecting also the ambiguity resolution of the GNSS records process [25], which is not though the case of our measurements since, similar receivers are used for each pair of receivers. The zero-baseline measurements may not reflect the real conditions of GPS monitoring measurements, but it is common experimental approach where the contribution of the multi-GNSS constellation can be reliably evaluated.…”

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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“…Figure illustrates the distribution of 13 stations from both MGEX and CMONOC that track BeiDou signals. All these stations are equipped with Trimble receivers so that there is no need to consider Inter‐Satellite‐Type Bias (ISTB) . Data sets collected during three periods, including DOY 350–356 in 2013, DOY 070–076 and 170–176 in 2014, were used to form the GFIF observables using Equations to and estimate the coefficients of code biases in the model (Equation ) for each type of satellite.…”

Section: Experiments and Resultsmentioning

confidence: 99%

Wide-area Kinematic Positioning with BeiDou Triple-frequency Signals

et al. 2017

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A key challenge of wide-area kinematic positioning using the BeiDou system is to reduce the effects of the elevation-dependent hardware biases in code signals. Based on three geometry-free/ionosphere-free combinations, the elevation-dependent code biases are modeled for all BeiDou satellites. Results from the data sets for 5 baselines of 533 to 2545 km demonstrate that the wide-lane (WL) integer-fixing success rates of 95% to 99% can be achieved within 50 independent epochs. Under the condition of HDOP less than 2, the overall RMS statistics of ionospheric-free WL single-epoch solutions achieve 24 to 50 cm in the horizontal direction. Smoothing processing over the moving window of 40 epochs reduces the RMS values by a factor of about 2. Considering the distanceindependent nature, the above results show the potential for achieving reliable and high-precision positioning with sparsely distributed ground stations regionally or globally.

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“…To illustrate this point, we derive the following identity on the basis of the code ISTB definition described in [34] …”

Section: Methodsmentioning

confidence: 99%

“…Special care has been taken to properly deal with the code inter-satellite-type-biases (ISTBs) when retrieving BeiDou BR-DCBs with our method. Generally, the BeiDou code ISTBs interpreted as the ''double-differenced'' receiver code biases between two receivers and two BeiDou satellite types are found to be significant for receiver-pairs of mixed types [34]. We are about to investigate the effect of them on the consistency between BeiDou GEO/IGSO/MEO BR-DCB estimates.…”

Section: Introductionmentioning

confidence: 98%

Characterization of multi-GNSS between-receiver differential code biases using zero and short baselines

Zhang

Teunissen

2015

Science Bulletin

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Care should be taken to minimize adverse impact of receiver differential code biases (DCBs) on global navigation satellite system (GNSS)-derived ionospheric parameters. It is therefore of importance to ascertain the intrinsic characteristics of receiver DCBs, preferably in the context of new-generation GNSS. In this contribution, we present a method that enables time-wise retrieval of between-receiver DCBs (BR-DCBs) from dualfrequency, code-only measurements collected by a pair of co-located receivers. This method is applicable to the US GPS as well as to a new set of GNSS constellations including the Chinese BeiDou, the European Galileo and the Japanese QZSS. With the use of this method, we determine the multi-GNSS BR-DCB time-wise estimates covering a time period of up to 2 years (January 2013-March 2015) with a 30-s time resolution for five receiverpairs (four zero and one short baselines). For the BR-DCB time-wise estimates pertaining to an arbitrary receiver-pair and constellation, we demonstrate their promising intraday stability by means of statistical hypothesis testing. We also find that the BeiDou BR-DCB daily weighted average (DWA) estimates show a dependence on satellite type, in particular for receiver-pairs of mixed types. Finally, we demonstrate that long-term variability in BR-DCB DWA estimates can be closely associated with hardware temperature variations inside the receivers.

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BeiDou Inter-Satellite-Type Bias Evaluation and Calibration for Mixed Receiver Attitude Determination

Cited by 55 publications

References 42 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

Wide-area Kinematic Positioning with BeiDou Triple-frequency Signals

Characterization of multi-GNSS between-receiver differential code biases using zero and short baselines

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