<h2>AAS  96-210</h2><h2>ERROR ANALYSIS AND STABILITY INVESTIGATION OF INTEGRATED GPS/INS NAVIGATION SYSTEMS</h2><h4>D. G. Tuckness and D. J. Jwo, The University of Texas at Arlington</h4><h2> Abstract </h2>Based on prior knowledge of the noise information, a Kalman filter is used to obtain the optimal gains for different noise bandwidths of the receiver tracking loops under varying noise environments. The inertial-navigation-system (INS) information can be used to aid the receiver tracking process in order to maintain track during high dynamics or low signal-to-noise ratio (SNR). However, stability problems might occur due to the INS information aiding the Global Positioning System (GPS). Noise becomes correlated over time as it is reintroduced back into the system through aiding. Results of the error signal analysis and stability investigation for an integrated GPS/INS navigation systems, is presented. <br><br>