Print Email Facebook Twitter A 4D tomographic ionospheric model to support PPP-RTK Title A 4D tomographic ionospheric model to support PPP-RTK Author Olivares-Pulido, G. (CRC for Spatial Information) Terkildsen, M. (Bureau of Meteorology Australia) Arsov, K. (Bureau of Meteorology Australia) Teunissen, P.J.G. (TU Delft Mathematical Geodesy and Positioning; Curtin University) Khodabandeh, A. (Curtin University; University of Melbourne) Janssen, V. (NSW DFSI Spatial Services) Date 2019 Abstract Successful implementation of integer ambiguity resolution enabled precise point positioning (aka PPP-RTK) algorithms is inextricably linked to the ability of a user to perform near real-time positioning by quickly and reliably resolving the integer carrier-phase ambiguities. In the PPP-RTK technique, a major barrier to successful ambiguity resolution is the unmodelled impact of the ionosphere. We present a 4D ionospheric tomographic model that computes in real time the ionospheric electron density as a linear combination of basis functions, namely B-splines. The results show that when the ionospheric estimates are provided as atmospheric corrections for a PPP-RTK end-user, the time to fix its horizontal position below 10 cm is around 20 epochs (the sample rate is 30 s) at the 90 % of the cumulative distribution function (CDF), as opposed to the time it takes when no external corrections are provided, which is around 80 epochs at 90 % of the CDF. Subject B-splinesGNSSIonospherePPP-RTKTomography To reference this document use: http://resolver.tudelft.nl/uuid:816ce93c-ebce-4e71-b56f-87eb113f9658 DOI https://doi.org/10.1007/s00190-019-01276-4 Embargo date 2020-01-22 ISSN 0949-7714 Source Journal of Geodesy, 93 (9), 1673-1683 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2019 G. Olivares-Pulido, M. Terkildsen, K. Arsov, P.J.G. Teunissen, A. Khodabandeh, V. Janssen Files PDF Untitled_1.pdf 1.37 MB Close viewer /islandora/object/uuid:816ce93c-ebce-4e71-b56f-87eb113f9658/datastream/OBJ/view