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

Zhang, Baocheng; Teunissen, Peter

doi:10.1007/s11434-015-0911-z

Cited by 67 publications

(44 citation statements)

References 35 publications

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“…Interestingly, it is found that, both time series are slightly different in the magnitude, but remarkably similar in the trend. The difference can be attributed to the fact that, the receiver bias value usually depends, in addition to other factors such as hardware and antenna, on the GNSS constellation (Zhang and Teunissen 2015). On the other hand, the similarity lies particularly in the fact that the same (or, at least, close to the same) oscillating behavior is simultaneously present in both time series, and that oscillation occurs every day between 01:00 GPST (09:00 LT) and 13:30 GPST (21:30 LT), corresponding exactly to the time interval when the air-conditioning system is on.…”

Section: Characterization Of Br-dpb Estimatesmentioning

confidence: 99%

On the short-term temporal variations of GNSS receiver differential phase biases

Zhang

Teunissen

Yuan

2016

J Geod

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Abstract. As a first step towards studying the ionosphere with the Global Navigation Satellite System (GNSS), leveling the phase to the code geometry-free observations on an arc-by-arc basis yields the ionospheric observables, interpreted as a combination of slant total electron content along with satellite and receiver Differential Code Biases (DCB). The leveling errors in the ionospheric observables may arise during this procedure, which, according to previous studies by other researchers, are due to the combined effects of the code multipath and the intra-day variability in the receiver DCB. In this paper we further identify the short-term temporal variations of receiver Differential Phase Biases (DPB) as another possible cause of leveling errors. Our investigation starts by the development of a method to epoch-wise estimate Between-Receiver DPB (BR-DPB) employing (inter-receiver) single-differenced, phase-only 2GNSS observations collected from a pair of receivers creating a zero or short baseline. The key issue for this method is to get rid of the possible discontinuities in the epoch-wise BR-DPB estimates, occurring when satellite assigned as pivot changes. Our numerical tests, carried out using GPS (Global Positioning System, US GNSS) and BDS (BeiDou Navigation Satellite System, Chinese GNSS) observations sampled every 30 seconds by a dedicatedly selected set of zero and short baselines, suggest two major findings. First, epoch-wise BR-DPB estimates can exhibit remarkable variability over a rather short period of time (e.g. 6 centimeters over 3 hours), thus significant from a statistical point of view. Second, a dominant factor driving this variability is the changes of ambient temperature, instead of the un-modelled phase multipath.

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Section: Characterization Of Br-dpb Estimatesmentioning

confidence: 99%

On the short-term temporal variations of GNSS receiver differential phase biases

Zhang

Teunissen

Yuan

2016

J Geod

Self Cite

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“…First, original dual-frequency GPS phase and pseudo-range data from the 21 selected sites were preprocessed by removing gross errors and then detecting and repairing cycle slips using Melbourne-Wuebbena linear combinations, geometry-free linear combinations, and ionosphere-free linear combinations (for more details, refer to [40][41][42][43][44]). Then, we calculated the ROT along the signal paths (epoch by epoch), which allowed us to obtain the corresponding TEC fluctuation index ROTI.…”

Section: Methods and Data Processingmentioning

confidence: 99%

Observational Analysis of Variation Characteristics of GPS-Based TEC Fluctuation over China

Liu

Yuan

Tan

et al. 2016

IJGI

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Abstract:In this study, the characteristics of the total electron content (TEC) fluctuations and their regional differences over China were analyzed by utilizing the rate of the TEC index (ROTI) based on GPS data from 21 reference stations across China during a solar cycle. The results show that there were significant regional differences at different latitudes. Strong ionospheric TEC fluctuations were usually observed at lower latitudes in southern China, where the occurrence of TEC fluctuations demonstrated typical nighttime-and season-dependent (equinox months) features. This phenomenon was consistent with the ionospheric scintillation characteristics of this region. Additionally, compared to low-latitude China, the intensity of TEC fluctuations over mid-latitude China was significantly weaker, and the occurrence of TEC fluctuations was not a nighttime-dependent phenomenon. Moreover, the intensity of TEC fluctuations was much stronger during high solar activity than during low solar activity. Furthermore, the summer-dependent characteristics of TEC fluctuations gradually emerged over lower mid-latitude areas as equinox characteristics weakened. Similar to the equinox characteristics, the summer-dependent characteristics gradually weakened or even disappeared with the increasing latitude. Relevant discussions of this phenomenon are still relatively rare, and it requires further study and analysis.

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“…One strategy fixes the DCBs of a receiver or satellite, with the DCB parameters of the other receivers and satellites to be solved afterwards. Another strategy adopts the DCBs gravity datum of one satellite as the constraint , and it is assumed that the sum of all the satellite DCBs of that satellite is zero; thus, the equation of the gravity datum is

{dcb}_{italici, italicj}^{1} + \dots + {dcb}_{italici, italicj}^{n} = 0

…”

Section: Mathematical Modelmentioning

confidence: 99%

Characteristics and Precision Analysis of BeiDou2 Satellite Differential Code Bias Products

et al. 2018

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Currently, resolution of the BeiDou2 satellites differential code bias (DCB) is greatly limited by the number of tracking stations and data quality. To improve the precision of calculated DCBs, an adaptive control method, based on elevation angle weight and posteriori variance factor, is proposed. The feasibility and precision of the proposed method are verified via analysis of the DCBs precision and application of single‐frequency precise point positioning (SF‐PPP). The results show that the long‐term variation of the daily BeiDou2 satellite DCB sequence is stable and the precision of DCBs of BeiDou2 satellites in different constellations is different. In addition, it is found by using periodogram and fast Fourier transform (FFT) methods that weekly and daily periodic signals exist in the daily BeiDou2 satellite DCB products. The results of SF‐PPP show that root mean square (RMS) horizontal residual is reduced by 10% and convergence time is shortened significantly using DCB products. © 2018 Institute of Navigation

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

Cited by 67 publications

References 35 publications

On the short-term temporal variations of GNSS receiver differential phase biases

On the short-term temporal variations of GNSS receiver differential phase biases

Observational Analysis of Variation Characteristics of GPS-Based TEC Fluctuation over China

Characteristics and Precision Analysis of BeiDou2 Satellite Differential Code Bias Products

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