Title :
Compensation of selected availability using a GPS/INS extended Kalman filter
Author :
Negast, William J. ; Paschall, Randall N.
Author_Institution :
Dept. of Electr. & Comput. Eng., Air Force Inst. of Technol., Wright-Patterson AFB, OH, USA
Abstract :
The authors describe research to compensate for selected availability (SA) corruption by modifying the Kalman filter used in a typical Global Positioning System/inertial navigation system (GPS/INS) integration. Two modified filters are developed: one filter that models SA using individual error-states and another filter that compensates for SA by increasing the measurement noise. Neither of these filters totally eliminates the corruption due to SA, but both provide a significant increase in the accuracy of the navigation solution
Keywords :
Kalman filters; error compensation; filtering and prediction theory; inertial navigation; radionavigation; satellite relay systems; GPS/INS extended Kalman filter; Global Positioning System; error-states; inertial navigation; measurement noise; reduced order filter; selected availability; truth model; Costs; Degradation; Error analysis; Global Positioning System; Inertial navigation; Kalman filters; Noise measurement; Performance analysis; Position measurement; Switches;
Conference_Titel :
Aerospace and Electronics Conference, 1992. NAECON 1992., Proceedings of the IEEE 1992 National
Conference_Location :
Dayton, OH
Print_ISBN :
0-7803-0652-X
DOI :
10.1109/NAECON.1992.220595
