Title: REGIONAL PLANNING OF DGNSS RADIOBEACON SERVICES
Author(s): David Last, Erdem Turhan, and Nick Ward
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 48, Number 4
Pages: 247 - 254
Cite this article: Last, David, Turhan, Erdem, Ward, Nick, "REGIONAL PLANNING OF DGNSS RADIOBEACON SERVICES", NAVIGATION, Journal of The Institute of Navigation, Vol. 48, No. 4, Winter 2001-2002, pp. 247-254.
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Abstract: The rapid development of differential global navigation satellite system (DGNSS) transmissions from maritime radiobeacons has further increased the occupancy of an already overcrowded frequency band, especially in Europe. This in turn has resulted in interference between stations, with substantial reductions in coverage. This paper describes the process by which the channels of the band have been reallocated throughout the European Maritime Area. This reorganization has taken careful account of the groundwave and skywave propagation of both wanted and interfering signals and of the distribution of atmospheric noise. A novel algorithm has been developed for reassigning the frequencies. The resulting band plan, introduced in September 2001, is shown to offer substantially increased coverage for the DGNSS radiobeacon service, while preserving the performance of the remaining marine and aeronautical direction-finding stations. This approach to the planning of DGNSS radiobeacon frequency allocations is now being adopted in other regions of the world.