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Geoscientific Instrumentation, Methods and Data Systems An interactive open-access journal of the European Geosciences Union
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https://doi.org/10.5194/gi-2020-28
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gi-2020-28
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  30 Sep 2020

30 Sep 2020

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This preprint is currently under review for the journal GI.

Single Point Positioning with Vertical Total Electron Content estimation based on single epoch data

Artur Fischer, Sławomir Cellmer, and Krzysztof Nowel Artur Fischer et al.
  • Department of Geodesy, University of Warmia and Mazury, Olsztyn, 10-719, Poland

Abstract. This paper proposes a new mathematical method of ionospheric delay estimation in single point positioning (SPP) using a single-frequency receiver. The proposed approach focuses on the ΔVTEC component estimation (MSPPwithdVTEC) with the assumption of an initial and constant value equal to 5 in any observed epoch. The principal purpose of the study is to examine the reliability of this approach to become independent from the external data in the ionospheric correction calculation process. To verify the MSPPwithdVTEC, the SPP with the Klobuchar algorithm was employed as a reference model, utilizing the coefficients from the navigation message. Moreover, to specify the level of precision of the MSPPwithdVTEC, the SPP with the IGS TEC map was adopted for comparison as the high-quality product in the ionospheric delay determination. To perform the computational tests, real code data was involved from three different localizations in Scandinavia using two parallel days. The criterion were the ionospheric changes depending on geodetic latitude. Referring to the Klobuchar model, the MSPPwithdVTEC obtained a significant improvement of 15–25 % in the final SPP solutions. For the SPP approach employing the IGS TEC map and for the MSPPwithdVTEC, the difference in error reduction was not significant, and it did not exceed 1.0 % for the IGS TEC map. Therefore, the MSPPwithdVTEC can be assessed as an accurate SPP method based on error reduction value, close to the SPP approach with the IGS TEC map. The main advantage of the proposed approach is that it does not need external data.

Artur Fischer et al.

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Artur Fischer et al.

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Latest update: 29 Oct 2020
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Short summary
The simple and autonomous ionospheric corrections estimation method in the SPP allows to be independent of external products delivering information of the ionospheric delay. The mathematical model gives improved solutions in reference to the SPP approach with the Klobuchar algorithm and ensures results on a similar level using the IGS TEC map. The numerical experiment was carried out utilizing real GNSS data and Matlab environment.
The simple and autonomous ionospheric corrections estimation method in the SPP allows to be...
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