The project envisages to build a robust, reliable and uninterrupted navigation mechanism by using GNSS-INS integrated system as an effective and promising solution for accuracy, anti-jamming reliable positioning etc. In this project it is intended to develop more accurate tightly-coupled closed loop KF based GNSS-INS integration technique with improved performance by incorporating few additional features and implementing in embedded platform. The new features include incorporation of auto-regression model, and re-calibration of sensors to improve the overall accuracy and reliability in determination of position, velocity and attitude.