Relation between daytime and nighttime values of the critical frequency foF2

A. D. Danilov
2006 International Journal of Geomagnetism and Aeronomy  
1] The effect detected earlier by L. B. Vanina and A. D. Danilov (2003) is discussed in detail. The effect is that a high enough and statistically significant negative correlation coefficient is observed between the near-noon and near-midnight values of the critical frequency f o F 2. In this paper, the peculiarities of the effect (dependence on season, solar and geomagnetic activity, and geomagnetic latitude) are considered in detail on the basis of the data of a few ionospheric stations
more » ... eric stations located in various geographic zones. INDEX TERMS: 2499 Ionosphere: General or miscellaneous; 2443 Ionosphere: Midlatitude ionosphere; 2427 Ionosphere: Ionosphere/atmosphere interactions; KEYWORDS: Critical frequency; Day-to-night ratio; Seasonal variation. Citation: Danilov, A. D. (2006), Relation between daytime and nighttime values of the critical frequency foF2, Int.
doi:10.1029/2005gi000129 fatcat:w4d6nkdosbd3bpgnbgptpskgnm