00000nam 2200000zi 4500 9.954357 CaOODSP 20250918111848 m o d f cr bn||||||||| 250821e199612 oncad obt f000|0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn--- DR52-17/77-1996E-PDF Read, William J. L., author. Multipath modelling for terrestrial VHF radio direction finding (U) / by William Read. Ottawa : Defence Research Establishment Ottawa, December 1996. 1 online resource (1 volume (various pagings)) : illustrations, charts. text txt rdacontent computer c rdamedia online resource cr rdacarrier DREO report ; no. 1300 Digitized edition from print [produced by Defence Research and Development Canada]. "Project 5BD12." Includes bibliographical references. "This report details the development of computer models to investigate and explain the effects of multipath on VHF radio direction finding (DF). The motivation for this development was to help explain the large and small scale multipath effects which occur for changes in transmitter and receiver position, or for changes in frequency. This is particularly important when analyzing the capabilities of current wide and narrow band DF methods, or when developing new DF methods. The development of the computer models is based on representing the terrain and vegetation affecting the signal by a large number of small (relative to the signal wavelength) isotropic reradiators. Polarization effects are not accounted for. Although this kind of approach can quickly become a computationally daunting task, a number of simplifications are introduced which greatly simplify the calculations. Two examples have been included illustrating the use of the proposed approach in the analysis and modelling of real world measurements"--Abstract, page iii. Includes abstracts in English and French. Radio Interference Computer simulation. Radio wave propagation Measurement. Radio Brouillage Simulation par ordinateur. Ondes radioélectriques Propagation Mesure. Defence Research Establishment Ottawa, issuing body. DREO report ; no. 1300. (CaOODSP)9.941661 PDF 3.90 MB https://publications.gc.ca/collections/collection_2025/rddc-drdc/DR52-17-77-1996-eng.pdf Project 5BD12