Weights of Multiscale Ionospheric Tomography Determination Method Based on Mixed Penalty Function

doi:10.11947/j.AGCS.2016.F037

Abstract

Abstract:

For the ionospheric electron density (IED) distribution based on GNSS, multi-scale ionospheric tomography (MST) is a simultaneous application of many overlapping single-scale tomography (SST) with different pixel sizes by using the weight factor. MST can effectively solve the problem of the final IED distortion and the inadaptable problem in SST. In MST, the weight between different SST models is an important factor to influence the final ionospheric tomography accuracy. In order to obtain a high accuracy of MST model, considering the existence of equality and inequality constraints between the weights,the penalty function method is applied to the weights determination. Based on GNSS Observations for the tomographic reconstruction of IED distribution, the experimental results show that the accuracy of MST model obtained by the penalty function method is the highest than other methods. It is proved that the accuracy of the ionospheric tomography model can be effectively improved by using the appropriate weight factor.

Key words: GNSS, ionosphere, computerized ionospheric tomography, weight factor, mixed penalty function method

CLC Number:

P227

YU Longfei, HU Wusheng, HAN Lixiang, ZHENG Dunyong. Weights of Multiscale Ionospheric Tomography Determination Method Based on Mixed Penalty Function[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(S2): 156-164.

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