| タイトル | True covariance simulation of the EUVE (extreme ultra violet explorer) update filter |
| 著者（英） | Bar-Itzhack, I. Y.; Harman, R. R. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1990-02-22 |
| 言語 | eng |
| 内容記述 | This paper presents a covariance analysis of the performance and sensitivity of the attitude determination Extended Kalman Filter (EKF) used by the onboard computer (OBC) of the Extreme Ultra Violet Explorer (EUVE) spacecraft. The linearized dynamics and measurement equations of the error states are used in formulating the 'truth model' describing the order of the systems involved. The 'design model' used by the OBC EKF is then obtained by reducing the order of the truth model. The covariance matrix of the EKF which uses the reduced order model is not the correct covariance of the EKF estimation error. A 'true covariance analysis' has to be carried out in order to evaluate the correct accuracy of the OBC generated estimates. The results of such analysis are presented which indicate both the performance and the sensitivity of the OBC EKF. |
| NASA分類 | SPACECRAFT INSTRUMENTATION |
| レポートNO | 92N31878 |
| 権利 | No Copyright |
