Wave Propagation in the Ionosphere

Rawer, K.

doi:10.1007/978-94-017-3665-7

Cited by 79 publications

(57 citation statements)

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“…404-408], who explained the polarization rotation found experimentally by Faraday in 1845 [35,36]. This magneto-ionic propagation is treated in [32,[37][38][39]. The critical frequency of the ionospheric layer is different for each of these waves.…”

Section: Characteristic Wave Propagationmentioning

confidence: 99%

Radio communication via Near Vertical Incidence Skywave propagation: an overview

Witvliet

Alsina-Pagès

2017

Telecommun Syst

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Section: Characteristic Wave Propagationmentioning

confidence: 99%

Radio communication via Near Vertical Incidence Skywave propagation: an overview

Witvliet

Alsina-Pagès

2017

Telecommun Syst

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“…It is generally accepted that the large variety of irregular ionospheric structures falls into two major categories (Davies, 1990;Hargreaves, 1992;Rawer, 1993): those produced by rapid changes of thermospheric composition (or alternatively, induced by large-scale electrodynamic drifts), and the others, well known as Travelling Ionospheric Disturbances (TIDs). Although not exclusively, ionospheric gradients showing preferences to NE-SW and SE-NW directions are known to characterize propagation of middle-scale TIDs.…”

Section: Discussionmentioning

confidence: 99%

Trans-ionospheric GPS signal delay gradients observed over mid-latitude Europe during the geomagnetic storms of October–November 2003

Stankov

Warnant

Stegen

2009

Advances in Space Research

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Ionospheric disturbances are known to have adverse effects on the satellite-based communication and navigation. One particular type of ionospheric effects, observed during major geomagnetic storms and threatening the integrity performance of both ground-based and space-based GNSS augmentation systems, is the sharp increase/decrease in the ionospheric delay that propagates in horizontal direction, thus called for convenience 'moving ionospheric wall'. This paper presents preliminary results from researching such anomalous ionospheric delay gradients at European middle latitudes during the storm events of 29 October 2003 and 20 November 2003. For the purpose, 30-second GPS data from the Belgian permanent network was used for calculating and analysing the slant ionospheric delay and total electron content values. It has been found that, during these two particular storm events, substantial gradients did occur in Europe although they were not so pronounced as in the American sector.

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“…A horizontal variation of the ionosphere is not considered, though it is no problem to describe any ionosphere by means of multiple phase screens. The ionospheric refractive index n is calculated by Sellmeier s dispersion relation [Rawer, 1993] …”

Section: Oblique Hf Radio Propagation For Quiet Ionospheric Conditionmentioning

confidence: 99%

Wave‐optical simulation of the oblique HF radio field

Hocke

Igarashi

2003

Radio Science

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[1] A wave-optical simulation of the oblique HF radio field is carried out by means of the multiple phase screen (MPS) technique which is frequently used for study of atmospheric effects on the propagation of electromagnetic waves. Contrary to previous studies on ionospheric HF radio propagation, the simulation is carried out for a cone of HF radio waves transmitted with elevation angles 0-35Њ from a point source at the ground. The ionospheric phase screens are approximately orthogonal to the Earth s surface, and the curvature of the Earth is considered. The HF radio field is determined from the surface to the topside ionosphere in two dimensions (x,z) by using ionospheric phase path screens with a z-resolution of 10 m and a screen spacing of 0.5 km in x-direction. Reflection of radio waves at the Earth s surface is implemented for the MPS simulation by means of an artificial decrease of the refractive index at heights below the surface (surface acts like an ionospheric layer in this rough approximation). The results are checked by means of ray tracing. The wave-optical simulation is applied for description of focusing and defocusing of oblique HF radio waves around the main focus in the F 1 -region and along the caustics where radio scintillations of high spatial frequencies are found due to interference and diffraction effects. One example is presented for the impact of a sporadic E layer on the HF radio field. Angular spectra of received radio signals are calculated at different locations of the HF radio field.

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Wave Propagation in the Ionosphere

Cited by 79 publications

References 0 publications

Radio communication via Near Vertical Incidence Skywave propagation: an overview

Radio communication via Near Vertical Incidence Skywave propagation: an overview

Trans-ionospheric GPS signal delay gradients observed over mid-latitude Europe during the geomagnetic storms of October–November 2003

Wave‐optical simulation of the oblique HF radio field

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