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Annals of Geophysics
Telecommunications via ionospheric reflection of radio signals of ground-based transmitters are a traditional area. However, this technique is still in use in telecommunications, broadcasting, etc. Various problems have not yet been solved and some of them were studied in Working Group 3 (WG3). Structure of WG 3 and the terms of reference of its four working packages are described in the introductory paper by Zolesi and Cander (2004). Here we describe the main results achieved in COST 271 indoi:10.4401/ag-3299 doaj:3edcbb512a6e4d4b90c3033aecfa41b1 fatcat:qw42ldpm4fhhbahvfiqoaiohbq