An Improved Method of Ionospheric Tomography

An improved method of computerized ionospheric tomography is proposed in this paper for the problems of the inversion result depend on the initial guess for iteration in case of GPS data is not sufficient. In this method, the single layer ionosphere model and the tomography model are combined. At first, sufficient TEC data interpolated by the single layer ionosphere model are used in the tomographic inversion and then we use its results as the initial iteration value for the final iteration. Experimental results show that accuracy of this improved computerized ionospheric tomography method has been greatly improved compared with the Multiplicative Algebraic Reconstruction Techniques (MART), the new method has improved the imaging quality of the ionospheric tomography effectively.