Please use this identifier to cite or link to this item:
Authors: Warrington, E. M.* 
Bourdillon, A.* 
Benito, E.* 
Bianchi, C.* 
Monilie, J. P.* 
Muriuki, M.* 
Pietrella, M.* 
Rannou, V.* 
Rothkaehl, H.* 
Saillant, S.* 
Sari, O.* 
Stocker, A. J.* 
Tulunay, E.* 
Tulunay, Y.* 
Zaalov, N. Y.* 
Title: Aspects of HF radio propagation
Journal: Annals of Geophysics 
Series/Report no.: 4/52 (2009)
Publisher: Editrice Compositori
Issue Date: Aug-2009
Keywords: Ionospheric propagation
mid-latitude trough
propagation modelling
backscatter sounding
Subject Classification01. Atmosphere::01.02. Ionosphere::01.02.05. Wave propagation 
Abstract: The propagation characteristics of radio signals are important parameters to consider when designing and operating radio systems. From the point of view Working Group 2 of the COST 296 Action, interest lies with effects associated with propagation via the ionosphere of signals within the HF band. Several aspects are covered in this paper: a) The directions of arrival and times of flight of signals received over a path oriented along the trough have been examined and several types of propagation effects identified. Of particular note, combining the HF observations with satellite measurements has identified the presence of irregularities within the floor of the trough that result in propagation displaced from the great circle direction. An understanding of the propagation effects that result in deviations of the signal path from the great circle direction are of particular relevance to the operation of HF radiolocation systems. b) Inclusion of the results from the above mentioned measurements into a propagation model of the northerly ionosphere (i.e. those regions of the ionosphere located poleward of, and including, the mid-latitude trough)and the use of this model to predict the coverage expected from transmitters where the signals impinge on the northerly ionosphere. c) Development of inversion techniques enabling backscatter ionograms obtained by an HF radar to be used to estimate the ionospheric electron density profile. This development facilitates the operation of over the horizon HF radars by enhancing the frequency management aspects of the systems. d) Various propagation prediction techniques have been tested against measurements made over the trough path mentioned above, and also over a long-range path between Cyprus and the UK. e) The effect of changes in the levels of ionospheric disturbances on the operational availability at various data throughput rates has been examined for the trough path mentioned earlier. The topics covered in this paper are necessarily brief, and the reader is referred to full papers referenced herein on individual aspects.
Appears in Collections:Article published / in press

Files in This Item:
File Description SizeFormat
Warrington-2009.pdfmain article3.76 MBAdobe PDFView/Open
Show full item record

Page view(s) 10

Last Week
Last month
checked on May 15, 2021

Download(s) 10

checked on May 15, 2021

Google ScholarTM