Establishment And Precision Analysis Of Regional Ionospheric Model

The precision of ionosphere delay correction is one of the main factors which affect the precision of satellite navigation and location. Ionosphere delay is affected by signal frequency and density of ionosphere electron. With double frequency navigation signal, ionosphere delay correction and density of ionosphere electron can be measure out. This paper utilize the GPS observation data of Observation Network of China crustal Engineering datum station. This paper analyze the precision of area ionosphere delay and precision of location with the data of different observation stations. The mostly content sum up as follows:1. The influence of satellite navigation signal caused by ionosphere delay is studied, as well as the methods eliminating ionosphere with dual-frequency pseudo-ranges and phases are given.2. The key technology of extracting ionospheric delay information from GPS measurements are discusses and analyzes. The theory and methods of regional ionospheric model.are study using regional GPS data. The regional(35°~55°N, 90°~ 150°E) ionospheric model is fit using spherical harmonic function, and Grid ionospheric model is established with it.3. Compared the use of internal and external precision of estimates in line with the use of Crustal Movement Observation Network of the benchmark networks have been established grid ionospheric model accuracy, a preliminary analysis of ionospheric models for positioning accuracy.