positive definiteness covariance 中文意思是什麼
positive definiteness covariance
解釋
正定協方差- positive : adj 1 確實的，明確的；確定的；無條件的 （opp qualified implied inferential）; 絕對的，無疑問的，...
- definiteness : 定指
- covariance : n. 【統計學】協方差，協變性；共離散。
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In order to improve the performance of ekf and ukf, the square soot unscented kalman filter ( sr - ukf ) with multiplicative noise is firstly investigated. considering the satellite nonlinear model, the sr - ukf attitude estimator is derived for gyroless satellite attitude estimation to render the state covariance with positive semi - definiteness and exceptional estimation accuracy
對于姿態估計，採用了rao - blackwellization技術將衛星模型狀態向量中的線性狀態部分（陀螺偏差）和非線性狀態部分（衛星姿態）分開處理，線性部分狀態可以由卡爾曼濾波（ kf ）估計得到，非線性部
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