F1 layer
noun Date: 1933 the lower of the two layers into which the F region of the ionosphere splits in the daytime that occurs at varying heights from about 80 to 120 miles (130 to 200 kilometers) above the earth's surface

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • f1 layer — ˈef|wən noun Usage: usually capitalized F : the lower and usually less densely ionized of the two layers into which the F region of the ionosphere splits in the daytime occurring at varying heights from about 90 to 150 miles above the earth s… …   Useful english dictionary

  • F1 layer — The lower layer of the ionosphere, it has the best concentrations of ions about 106/cm3 . Its height is around 100 miles (160 km). Its height varies in summers and winters as well as during the days and nights. It affects daytime radio wave… …   Aviation dictionary

  • F1 layer — /ef wun /. See under F layer. * * * …   Universalium

  • F1 (disambiguation) — F1 , F01, F.I, F.1 or F 1 may refer to any of the following:In computers: * Function 1 key, on a computer keyboard * F1 , the name of one of the Office Assistants in the Microsoft Office suite of softwareIn army, military crafts and weapons: * F1 …   Wikipedia

  • F layer — An ionized layer of atmosphere located approximately 90 to 240 miles (150–400 km) above the earth. This layer plays an important role in radio communications and reflects electromagnetic emissions from 1.5 to above 30 MHz. The height of the F… …   Aviation dictionary

  • ионизированный слой f1 — слой f1 По ГОСТ 24375 80 [ГОСТ 25645.113 84] Тематики ионосфера земли Обобщающие термины структура и характеристики ионосферы Синонимы слой f1 EN ionized f1 layer FR couche f1 ionisée …   Справочник технического переводчика

  • F2 layer — The upper layer of the ionosphere, it lies between 110 to 210 miles (180–350 km). The F2 layer is more persistent than the F1 layer. Its height varies in summers and winters as well as during the days and nights. It affects daytime propagation… …   Aviation dictionary

  • F layer — Physics. the highest of the radio reflective ionospheric layers, beginning at an altitude of ab. 80 mi. (130 km) and consisting of two parts, the lower part (F1 layer) being detectable in the daytime only, the higher (F2 layer or Appleton layer)… …   Universalium

  • F layer — n. the two dense layers of ions in the F region of the ionosphere that are used to reflect long range radio signals: the F1 layer, at an altitude of c. 200 to 300 km ( c. 125 to 185 miles), exists during the day, and the permanent F2 layer, or… …   English World dictionary

  • F region — The F region of the ionosphere is home to the F layer of ionization, also called the Appleton layer , after the English physicist Edward Appleton. As with other ionospheric sectors, layer implies a concentration of plasma, while region is the… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”