INS Aided Integrated Ambiguity Resolution for Robust Precise Positioning in Weak Signal Environments

Abstract

When vessels navigate the coast or an inland waterway, there are many bridges and facilities. These bridges and facilities give cause for weak signal of satellite. when receivers use weak signal, it is impossible to perform carrier phase based precise positioniing and is hard to search and maintain ambiguity of carrier phase. Therefore, it is necessary to develop robust precise positionint system operated in the weak signal environment. This paper proposes INS aided integrated ambiguity resolution for robust precise positioining under the weak signal environment. When satellite signal is weak, integrated carrier phase is estimated using dynamic charateristic of vessels based INS information. Carrier phase measurement is recomposed using estimated continuous and stable ACP information. The validity of propose method is evaluated by simulation. As a result, proposed method shows seamless positioning result.e based precise positioniing and is hard to search and maintain ambiguity of carrier phase. Therefore, it is necessary to develop robust precise positionint system operated in the weak signal environment. This paper proposes INS aided integrated ambiguity resolution for robust precise positioining under the weak signal environment. When satellite signal is weak, integrated carrier phase is estimated using dynamic charateristic of vessels based INS information. Carrier phase measurement is recomposed using estimated continuous and stable ACP information. The validity of propose method is evaluated by simulation. As a result, proposed method shows seamless positioning result.