Graduate School of
Science and Engineering

Satellite navigation/positioning systems based on artificial satellites such as American GPS, Russian GLONASS, European Galileo, Chinese BeiDou, Indian IRNSS and Japanese QZSS are collectively called GNSS (Global Navigation Satellite Systems). In this laboratory, we are focusing on various research areas related to GNSS positioning algorithm and its applications, such as, PPP (Precise Point Positioning), INS (Inertial Navigation System)/GNSS integration for land vehicle such as cars and trains, ionosphere modeling, image processing in navigation and pedestrian navigation in smartphones. For example, INS is an autonomous navigation system based on inertial sensors (accelerometer and gyroscope). With the development of MEMS technologies, the inertial sensors have been much easier to be utilized. However, the sensors have large unknown noises and/or biases. Therefore, the noises and/or biases are tried to be removed by integrating with GNSS through Kalman filter. In addition to GNSS, the map matching technique is often utilized for the car navigation systems. In this laboratory, we are trying to extend the map matching technique to the train positioning system based on the INS/ GNSS integration.