Propagation model for signal fluctuations on transionospheric radio links: Recent developments
Vadim E. Gherm, Nikolay N. Zernov, S. M. Radicella, Hal J. Strangeways · Acta Geodaetica et Geophysica Hungarica · 2002
The propagation model for signal fluctuations on transionospheric radio links previously developed by the authors has been further extended to be capable of describing some new applications e.g. spatial coherency of the field, or the time-correlation properties of level (log-amplitude) and phase fluctuations and their frequency spectra. In particular, the technique has been developed to also generate random time sequences of the level and phase of the field on transionospheric paths of propagation. Spatial coherency is of importance for differential GPS in the assessment of the additional fluctuational errors in rangefinding with respect to a reference GPS station whereas random time series are necessary for modelling the fluctuational Earth-satellite channel of propagation.