LORAN-C MEASUREMENT TRIALS IN IRELAND AND U.K.: INTERFERENCE, NOISE, AND FIELD STRENGTH RESULTS

David Last and Nick Ward

Peer Reviewed

Abstract:	A program of measurements is reported which has confirmed that carrier-wave interference is the key factor controlling Loran-C signal-to-noise ratio in Northwest Europe. The tests, at eight sites in Ireland and the U.K., identified 68 interfering signals, 17 of which exceeded the worst-case atmospheric noise. Many interferers were synchronous with Loran-C spectral lines. Especially prominent among the most serious interferers were Decca Navigator signals. The paper discusses the need for efficient filtering techniques and, where notch filters are used, the development of strategies to balance the conflicting claims of high-powered, wide-area interferers with those of the many low-powered Decca stations.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 37, Number 3
Pages:	233 - 248
Cite this article:	Last, David, Ward, Nick, "LORAN-C MEASUREMENT TRIALS IN IRELAND AND U.K.: INTERFERENCE, NOISE, AND FIELD STRENGTH RESULTS", NAVIGATION: Journal of The Institute of Navigation, Vol. 37, No. 3, Fall 1990, pp. 233-248.
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