1. ESA UGI (Unified-GNSS-Ionosphere): An open-source software to compute precise ionosphere estimates.
- Author
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Orus-Perez, R., Nava, B., Parro, J., and Kashcheyev, A.
- Subjects
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IONOSPHERE , *ROOT-mean-squares , *SPHERICAL harmonics , *ESTIMATES - Abstract
Ionospheric estimation is becoming more and more important for the new multifrequency positioning algorithms, since they can help to improve greatly the convergence time for acquiring a good positioning error. In this paper, an open source tool to estimate precise ionospheric estimates is presented, namely ESA UGI (Unified-GNSS-Ionosphere). The presentation is done jointly with a methodology to test ionospheric model using a modified NeQuick to generate synthetic data. The results with different option of the ESA UGI shows that it has a good performance below 1 TECU (Total Electron Content Units) in vTEC (vertical Total Electron Content) RMS (Root Mean Squared) for European networks, around 2 TECU in a well-covered African region and between 1 and 6 TECU globally with this synthetic data. It shows as well the capability of changing between different ionosphere models (voxel, multilayer and spherical harmonics) and configuration options. Finally, a test with uncombined PPP actual data is presented showing that instantaneous convergence below 30 cm in 3D RMS position error are achievable in a well sounded area in Europe. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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