the sporadic E-region

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• Sporadic E propagation — Sporadic E or Es is an unusual form of radio propagation utilizing characteristics of the earth s ionosphere. Whereas most forms of sky wave propagation use the normal and cyclic ionization properties of the ionosphere s F region to refract (or… …   Wikipedia

• THE MIDDLE AGES — …   Encyclopedia of Judaism

• sporadic E — noun A meteorological phenomenon where radio waves above a certain frequency are reflected in the atmospheric E region, allowing these radio waves to be received in distances up to 1,200 miles …   Wiktionary

• The Dalles, Oregon — The Dalles and the Columbia River as seen from Kelly Viewpoint …   Wikipedia

• The Moorings, New York — The Moorings is a guard gated private community in the unincorporated East Islip hamlet of Suffolk County, New York and is not a census designated place (CDP) within itself. It is situated on Long Island s Great South Bay.HistoryThe Moorings was… …   Wikipedia

• Sporadic — Occurring upon occasion or in a scattered, isolated or seemingly random way. A disorder that is sporadic is by definition neither an endemic, an epidemic, nor a pandemic: {{}}An endemic is present in a community at all times but in low frequency …   Medical dictionary

• History of the Australian Capital Territory — The history of the Australian Capital Territory as a Territory of Australia began after the Federation of Australia in 1901, when it was created in law as the site for Australia s capital city Canberra. The region has a long prior history of… …   Wikipedia

• 2008 timeline of the War in Somalia — The timeline of events in the War in Somalia during 2008 is set out below.= Casualties ={| style= float: right; clear: right; background color: transparent | Campaignbox Ethiopian war in Somalia=Timeline= January January 2, 2008 *3 civilians, 2… …   Wikipedia

• sporadic — spo|rad|ic [ spə rædık ] adjective 1. ) not regular or frequent: The explosions were only sporadic now. sporadic showers 2. ) MEDICAL a sporadic disease appears in separate areas of a country or region with no clear connection between the cases ╾ …   Usage of the words and phrases in modern English

• sporadic — UK [spəˈrædɪk] / US adjective 1) not regular or frequent The explosions were only sporadic now. sporadic showers 2) medical a sporadic disease appears in separate areas of a country or region with no clear connection between the cases Derived… …   English dictionary

• Geology of the Death Valley area — The exposed geology of the Death Valley area presents a diverse and complex story that includes at least 23 formations of sedimentary units, two major gaps in the geologic record called unconformities, and at least one distinct set of related… …   Wikipedia