| Автор | DuCharme, E. D. |
| Автор | Petrie, L. E. |
| Автор | Eyfrig, R. |
| Дата выпуска | 1973 |
| dc.description | A series of expressions to calculate the monthly median F<sub>1</sub> layer penetration frequency (ƒoF<sub>1</sub>) as a function of the ionospheric index IF<sub>2</sub> was reported by DuCharme et al., [1971]. Using similar techniques and the same data base, development of a series of expressions to calculate ƒoF<sub>1</sub> as a function of the Zurich smoothed sunspot number R<sub>12</sub> is described. The derived expressions are evaluated for the period of maximum solar activity 1967 through 1969 and compared with observed ƒoF<sub>1</sub> data for this period, which are outside the 1954 through 1966 data base used to develop the expressions. |
| Формат | application.pdf |
| Копирайт | Copyright 1973 by the American Geophysical Union. |
| Название | A method for predicting the F<sub>1</sub> layer critical frequency based on the Zurich smoothed sunspot number |
| Тип | article |
| DOI | 10.1029/RS008i010p00837 |
| Electronic ISSN | 1944-799X |
| Print ISSN | 0048-6604 |
| Журнал | Radio Science |
| Том | 8 |
| Первая страница | 837 |
| Последняя страница | 839 |
| Выпуск | 10 |
| Библиографическая ссылка | Allen, C. W., Critical frequencies, sunspots and the sun's ultraviolet radiation, Terr. Magn. Atmos. Elec., 53, 433–448, 1948. |
| Библиографическая ссылка | , CCIR (International Radio Consultative Committee),Documents of the XII Plenary Assembly (1970),New Delhi,, II, part 2,Recommendation 371–1, Choice of Basic Indices for Ionospheric Propagation, p.19,International Telecommunication Union,Geneva, Switzerland. |
| Библиографическая ссылка | DuCharme, E. D., L. E.Petrie, R.Eyfrig, A method for predicting the F1 layer critical frequency, Radio Sci., 6, 369–378, 1971. |
| Библиографическая ссылка | Minnis, C. M., A new index of solar activity based on ionospheric measurements, J. Atmos. Terr. Phys., 7, 310–321, 1955. |
| Библиографическая ссылка | Ratcliffe, J. A., K.Weekes, Physics of the Upper AtmosphereJ. A.Ratcliffe, chap. 9, 425–427, Academic, New York, 1960. |
| Библиографическая ссылка | Scott, J. C. W., The solar control of the E and F1 layers at high latitudes, J. Geophys. Res., 57, 369–386, 1952. |
