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Article
Study on the detection of abnormal sounding data based on LS-SVM
A new method of detecting abnormal sounding data based on LS-SVM is presented. The theorem proves that the trend surface filter is the especial result of LS-SVM. In order to depict the relationship of trend su...
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Chapter and Conference Paper
Unscented Kalman Filter Algorithm with Colored Noise and Its Application in Spacecraft Attitude Estimation
The accuracy and reliability of the estimation and prediction of satellite attitude are affected by not only the random noise and systematic errors, but also the colored noise related to time. Any theory or te...
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Article
Improved time-differenced cycle slip detect and repair for GNSS undifferenced observations
GNSS undifferenced signal processing, in which the individual signal of each frequency is treated as independent observable, has drawn increasing interest in GNSS community. However, undifferenced signal proce...
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Article
Real-time triple-frequency cycle slip detection and repair method under ionospheric disturbance validated with BDS data
In order to resolve the real-time cycle slip detection and repair problem with the data under ionospheric disturbance and low sample rate, a new method is proposed by using triple-frequency combinations. First...
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Article
Estimating satellite phase fractional cycle biases based on Kalman filter
Phase fractional cycle biases (FCBs) originating from satellites and receivers destroy the integer nature of PPP carrier phase ambiguities. To achieve integer ambiguity resolution of PPP, FCBs of satellites ar...
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Article
Estimating and assessing Galileo satellite fractional cycle bias for PPP ambiguity resolution
Due to the rapid deployment of the Galileo constellation, Galileo is now able to contribute to GNSS precise point positioning (PPP) ambiguity resolution (AR) with 17 operational satellites as of December 2017....
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Article
Analysis of Galileo/BDS/GPS signals and RTK performance
New satellites and signals become available with the modernization of GNSS, especially for Galileo and BDS. The current Galileo constellation comprises 4 IOV (in-orbit validation) and 14 FOC (full operational ...
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Article
Computationally efficient dual-frequency uncombined precise orbit determination based on IGS clock datum
Using uncombined (UC) or undifferenced original observations has become a research topic in the global navigation satellite system (GNSS) community. This far, precise orbit determination (POD) with ionospheric...
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Article
Variance-covariance component estimation for structured errors-in-variables models with cross-covariances
In this contribution, an iterative algorithm for variance-covariance component estimation based on the structured errors-in-variables (EIV) model is proposed. We introduce the variable projection principle and...
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Article
The BAB algorithm for computing the total least trimmed squares estimator
Robust estimation in the errors-in-variables (EIV) model remains a difficult problem because of the leverage point and the masking effect and swam** effect. In this contribution, a new robust estimator is in...
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Article
Alternative formulae for robust Weighted Total Least-Squares solutions for Errors-In-Variables models
Weighted Total Least-Squares (WTLS) can optimally solve the issue of parameter estimation in the Errors-In-Variables (EIV) model; however, this method is relatively sensitive to outliers that may exist in the ...