00000nam 2200000zi 4500 9.872586 CaOODSP 20221107163702 m o d f cr ||||||||||| 190507e195907##onca #o f000 0 eng d CaOODSP eng rda CaOODSP n-cn-on DR50-3/1959E-PDF Maynard, L. A., author. A study of 46 MC/S transmissions beyond the horizon in eastern Ontario / by L.A. Maynard. Ottawa : Defence Research Telecommunications Establishment, Communications Laboratory, July 1959. 1 online resource (v, 19 pages) : illustrations text txt rdacontent computer c rdamedia online resource cr rdacarrier Digitized edition from print [produced by Innovation, Science and Economic Development Canada]. "DRTE Report No. 1021." Includes bibliographical references. "This report concerns 46 Mc/s transmissions over a 185 mile path between North Bay and Ottawa. Continuous recordings of received signal amplitude were made from February 10, 1956 to February 2, 1958. In addition, synoptic weather information was obtained from Killaloe, about 25 miles south of the centre of the transmission path and from Maniwaki, about 90 miles north of Ottawa. The signal transmission loss showed a strong seasonal dependence in both monthly median level and in the extent of the diurnal variation. The summertime transmission loss coincided approximately with the amount reported by Bullington, but transmission loss in winter approached a value some 13 db greater than this. Regular intervals of high signal fading rate observed during winter months were attributed to signal transmission by an ionospheric mode of ground back-scatter. Intervals of high fading rate and large transmission loss were found to be associated with regions of strong airstream convergence"--Abstract. gccst Telecommunications gccst Radio Canada. Defence Research Board. PDF 2.34 MB https://publications.gc.ca/collections/collection_2019/isde-ised/DR50-3-1959-eng.pdf