Atmospheric effects on communications and electronic warfare systems within Turkey and surrounding areas
Pfeiffer, Karl D.
MetadataShow full item record
This thesis presents the most complete climatology of radio wave (VHF and higher frequencies) tropospheric ducting within Turkey and the surrounding areas ever published. This ducting can result in greatly extended propagation ranges. Atmospheric data from radiosonde upper air observations were collected for a five-year period at stations in Adana, Ankara, Diyarbakir, Isparta, Istanbul, Izmir, Athens, Bucharest, Crete Island, and Tuapse. The upper level and surface ducting yearly average frequencies for these stations were 59.46%, 34.22%, 37.53%, 38.15%, 50.67%, 45.69%, 64.69%, 30.24%, 65.59%, and 21.05%, respectively. Ducts occurred mostly in summer. These frequencies were much higher than previously published climatologies. However, many of these ducts were too shallow to be operationally significant. Atmospheric pressure was correlated with duct heights for some stations, but sometimes the correlation was positive while other times it was negative. In most cases, no correlation was found between duct height and wind speed or direction. Ducts tended to be more common in coastal regions. Regions away from the coast usually have topography limits the effects of the ducts away from the coast, and these inland regions tended to have less ducting occurrence Therefore, these results are most applicable to the coastal regions.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Abreu, Francisco Antonio Torres Vidal (1980-09);The purpose of this thesis is to study the temporal pattern of vertical land movements at selected Pacific Coast tide stations. The relative motion of the land at these stations is indicated by the relationship ...
Martin, Paul E. (Monterey, California: Naval Postgraduate School, 1999-03);We develop a mixed integer non-linear program, MS-LOCAL, to help the Department of Defense decide where to locate recruiting stations and how to allocate recruiters to those stations. The goal of MS-LOCAL is to obtain the ...
The characteristics of successful Marine Corps recruiting stations: leadership and information sharing Asmus, F. Michael. (Monterey, California. Naval Postgraduate School, 1996-09);Marine Corps recruiting duty is the toughest peacetime assignment for any Marine. It involves complex internal and external factors dealing with global, national, and local issues completely out of the control of recruiting ...