Characteristics of the measurement accuracy on wide area utility by Kinematic GPS

As the baseline length of Kinematic GPS (KGPS) becomes longer, the measurement accuracy deteriorates affected by the delay of radio wave propagation. In this case, the measurement accuracy improves by 2 frequencies process. However, it has not clarified the characteristics of the measurement accuracy practiced throughout the year by the long baseline length. Therefore, the authors analyzed a possibility of wide area utility of KGPS comparing the conditions of the electron density in the ionosphere with the measurement accuracy. As a result, this analysis demonstrated that even for the 320 km baseline length, the measurement accuracy of 10 cm or less could be obtained in the horizontal position.