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首页> 外文期刊>Journal of Geodesy >A new way of improving global ionospheric maps by ionospheric tomography: consistent combination of multi-GNSS and multi-space geodetic dual-frequency measurements gathered from vessel-, LEO- and ground-based receivers
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A new way of improving global ionospheric maps by ionospheric tomography: consistent combination of multi-GNSS and multi-space geodetic dual-frequency measurements gathered from vessel-, LEO- and ground-based receivers

机译：通过电离层断层扫描改善全局电离层地图的新方法：多GNSS和多空间大地电线电频率测量的一致组合从船舶，leo-和地面接收器中收集的

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摘要

In this work, we introduce a new way of improving the sligthly best performing global ionospheric model (GIM) within the International GNSS Service, the UQRG produced by UPC-IonSAT with the TOMION dual-layer voxel model solved with ground-based dual-frequency carrier phase GPS data combined with kriging interpolation. This is done by increasing its vertical resolution consistently with the heights of the now involved GNSS and DORIS LEO receivers. This has allowed the synergestic combination of vessel-, LEO- and ground-based measurements, providing an increase of the VTEC accuracy at global scale in large regions with sparse GPS ground-based data. The performance of the new resulting multiTOMION model is illustrated with a first application to one of the infrequent datasets, including the whole day of June 5, 2017, with all the involved input data collocated, in particular the vessel-based GNSS ones. The results show in particular: (1) an overall GIM improvement of 3% in standard deviation versus independent JASON-3 VTEC measurements when LEO- and ground- based GPS data are combined with DORIS measurements. And (2) a local improvement of 6-9% in performance versus observed differences of STEC from independent GPS receivers placed at several hundreds of km far from the vessel.
机译：在这项工作中，我们介绍了一种新的方式来改善国际GNSS服务内的懒惰最佳的全球电离层模型（GIM），由UPC-INSAT产生的UQC-INSAT与基于地基双频的扩大双层体素模型产生的UQRG载波相位GPS数据与Kriging插值相结合。这是通过将其垂直分辨率始终如一的垂直分辨率来完成的，这是现在涉及的GNSS和Doris Leo接收器的高度。这使得血管，leo-和基础测量的协同组合，在具有稀疏GPS地面数据的大区域中，在全球范围内增加了VTEC精度​​。新产生的多型多型模型的性能被第一个应用于一个不经常的数据集，包括2017年6月5日的整天，其中包括所有涉及的输入数据，特别是基于船舶的GNSS。结果特别地显示：（1）当基于Leo-和地面的GPS数据与Doris测量结合时，标准偏差与独立Jason-3 Vtec测量的总体上升性为3％。 （2）局部改善6-9％的性能与观察到的STEC差异来自独立GPS接收器，远离船只的数百km。

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