Effects of the Ionosphere on Telecommunications, Satellite Positioning, and Electric Navigations

Abstract

The origin of NICT is in the routine monitoring and studies of the ionosphere for keeping long distance telecommunications with shortwaves. This role has been decreasing with the development and wide uses of satellite communication, however, it is still fundamental infrastructure. In addition, the study of behavior of ionosphere become important in the utilities of satellite navigation. The global navigation satellite system (GNSS) ise xpected as an important and fundamental technique to build the secure and safety society. One is the example of the utility is electric navigation with GNSS. Because it is difficult for electric navigations to use any additional information from the ground station, the improvement of positioning precision become important. It is necessary to provide the ionospheric information precisely and on real time for contributing the next-generation utilities with GNSS.