中國(guó)區(qū)域VTEC模型Kriging算法研究
[Abstract]:In order to model the regional ionospheric delay in real time, the ionospheric delay model is constructed based on the spherical crown harmonic function model, the low order spherical harmonic function model, the polynomial model and the Kriging interpolation method, using the measured data of GPS in China. The spatial variability, correlation statistical calculation and Kriging interpolation method of the ionospheric vertical total electron content (vertical total electron) are discussed in detail. The real time modeling of the VTEC grid in China is realized. The results show that the fitting accuracy of VTEC in high latitudes is better than that of Kriging interpolation estimation and polynomial model in low latitudes, which is obviously superior to that of spherical crown harmonic function model and low order spherical harmonic function model. However, the square deviation of polynomial fitting grid has obvious marginal effect, and the precision of the center of fitting area is higher, and the VTEC variance estimated by Kriging algorithm is more in line with the actual situation, where there are more puncture points. Grid dot accuracy is high.
【作者單位】: 武漢大學(xué)衛(wèi)星導(dǎo)航定位技術(shù)研究中心;日本京都大學(xué);
【基金】:國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目(41231064) 國(guó)家高技術(shù)研究發(fā)展計(jì)劃(863)(2014AA123101) 中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金(2042016kf0061)~~
【分類號(hào)】:P228.4
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