scholarly journals BDS-3 differential code bias estimation with undifferenced uncombined model based on triple-frequency observation

2020 ◽  
Vol 94 (4) ◽  
Author(s):  
Shengfeng Gu ◽  
YinTong Wang ◽  
Qile Zhao ◽  
Fu Zheng ◽  
Xiaopeng Gong
Keyword(s):  
Bias Estimation ◽  
Differential Code Bias ◽  
Model Based ◽  
Triple Frequency ◽  
Code Bias ◽  
Frequency Observation

Influence of the GLONASS inter-frequency bias on differential code bias estimation and ionospheric modeling

GPS Solutions ◽  
2017 ◽  
Vol 21 (3) ◽  
pp. 1355-1367 ◽  
Author(s):  
Xiaohong Zhang ◽  
Weiliang Xie ◽  
Xiaodong Ren ◽  
Xingxing Li ◽  
Keke Zhang ◽  
...  
Keyword(s):  
Bias Estimation ◽  
Differential Code Bias ◽  
Ionospheric Modeling ◽  
Code Bias

scholarly journals Investigation and Validation of the Time-Varying Characteristic for the GPS Differential Code Bias

2019 ◽  
Vol 11 (4) ◽  
pp. 428 ◽  
Author(s):  
Haojun Li ◽  
Jingxin Xiao ◽  
Weidong Zhu
Keyword(s):  
Single Point ◽  
Time Varying ◽  
International Gnss Service ◽  
Data Set ◽  
Differential Code Bias ◽  
Triple Frequency ◽  
Code Bias ◽  
Constant Part ◽  
The Difference ◽  
Better Than

The time-varying characteristic of the bias in the GPS code observation is investigated using triple-frequency observations. The method for estimating the combined code bias is presented and the twelve-month (1 January–31 December 2016) triple-frequency GPS data set from 114 International GNSS Service (IGS) stations is processed to analyze the characteristic of the combined code bias. The results show that the main periods of the combined code bias are 12, 8, 6, 4, 4.8 and 2.67 h. The time-varying characteristic of the combined code bias, which is the combination of differential code bias (DCB) (P1–P5) and DCB (P1–P2), shows that the real satellite DCBs are also time-varying. The difference between the two sets of the computed constant parts of the combined code bias, with the IGS DCB products of DCB (P1–P2) and DCB (P1–P2) and the mean of the estimated 24-h combined code bias series, further show that the combined code bias cannot be replaced by the DCB (P1–P2) and DCB (P1–P5) products. The time-varying part of inter-frequency clock bias (IFCB) can be estimated by the phase and code observations and the phase based IFCB is the combinations of the triple-frequency satellite uncalibrated phase delays (UPDs) and the code-based IFCB is the function of the DCBs. The performances of the computed the IFCB with different methods in single point positioning indicate that the accuracy for the constant part of the combined code bias is reduced, when the IGS DCB products are used to compute. These performances also show that the time-varying part of IFCB estimated with phase observation is better than that of code observation. The predicted results show that 98% of the predicted constant part of the combined code bias can be corrected and the attenuation of the predicted accuracy is much less evident. However, the accuracy of the predicted time-varying part decreases significantly with the predicted time.

Multi-GNSS triple-frequency differential code bias (DCB) determination with precise point positioning (PPP)

2018 ◽  
Vol 93 (5) ◽  
pp. 765-784 ◽  
Author(s):  
Teng Liu ◽  
Baocheng Zhang ◽  
Yunbin Yuan ◽  
Zishen Li ◽  
Ningbo Wang
Keyword(s):  
Precise Point Positioning ◽  
Differential Code Bias ◽  
Triple Frequency ◽  
Code Bias ◽  
Point Positioning

Impact of GPS differential code bias in dual- and triple-frequency positioning and satellite clock estimation

GPS Solutions ◽  
2016 ◽  
Vol 21 (3) ◽  
pp. 897-903 ◽  
Author(s):  
Haojun Li ◽  
Bofeng Li ◽  
Lizhi Lou ◽  
Ling Yang ◽  
Jiexian Wang
Keyword(s):  
Satellite Clock ◽  
Differential Code Bias ◽  
Triple Frequency ◽  
Code Bias ◽  
Clock Estimation

scholarly journals GPS and BeiDou Differential Code Bias Estimation Using Fengyun-3C Satellite Onboard GNSS Observations

2017 ◽  
Vol 9 (12) ◽  
pp. 1239 ◽  
Author(s):  
Wenwen Li ◽  
Min Li ◽  
Chuang Shi ◽  
Rongxin Fang ◽  
Qile Zhao ◽  
...  
Keyword(s):  
Bias Estimation ◽  
Differential Code Bias ◽  
Code Bias ◽  
Gnss Observations

Differential Code Bias Estimation using Multi-GNSS Observations and Global Ionosphere Maps

Navigation ◽  
2014 ◽  
Vol 61 (3) ◽  
pp. 191-201 ◽  
Author(s):  
O. Montenbruck ◽  
A. Hauschild ◽  
P. Steigenberger
Keyword(s):  
Bias Estimation ◽  
Differential Code Bias ◽  
Code Bias ◽  
Gnss Observations

GPS satellite differential code bias estimation with current eleven low earth orbit satellites

2021 ◽  
Vol 95 (7) ◽  
Author(s):  
Xingxing Li ◽  
Wei Zhang ◽  
Keke Zhang ◽  
Qian Zhang ◽  
Xin Li ◽  
...  
Keyword(s):  
Low Earth Orbit ◽  
Earth Orbit ◽  
Bias Estimation ◽  
Differential Code Bias ◽  
Low Earth Orbit Satellites ◽  
Code Bias
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