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Using VLBI fringe-phase information from geodetic experiments for short-period ionospheric studies

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Abstract

The usage of Very Long Baseline Interferometry (VLBI) fringe-phase information in geodetic VLBI is a new field of research, which can be used for the detection of short-period (i.e., several minutes) variations (scintillations) of the ionosphere. This paper presents a method for the extraction of such disturbances and discusses how dispersive influences can be separated from intra-scan delay variations. A proper functional and stochastic model for the separation of the different effects is presented and the algorithms are applied to real measurements. In an example, it is shown that a traveling ionospheric disturbance in Antarctica can be detected very precisely. A possible physical origin and the propagation properties of the disturbance are presented and the results are compared with GPS measurements. The benefit of this method for other applications is also discussed.

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Hobiger, T., Kondo, T., Koyama, Y. et al. Using VLBI fringe-phase information from geodetic experiments for short-period ionospheric studies. J Geod 81, 389–401 (2007). https://doi.org/10.1007/s00190-007-0142-4

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  • DOI: https://doi.org/10.1007/s00190-007-0142-4

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