Relation Between Sunspot Number and the Ionospheric Index IF2
Open Access
- 1 November 1968
- journal article
- research article
- Published by American Geophysical Union (AGU) in Radio Science
- Vol. 3 (11) , 1109-1110
- https://doi.org/10.1002/rds19683111109
Abstract
A plot of the relationship (IF)12/R12. for each month of the period 1942–1967 exhibits a hysteresis characteristic in addition to a systematic change from one solar cycle to the next. A relationship based on all these data is proposed and a means is suggested of fitting this expression to the particular “half”‐cycle of mterest. In this way a conversion of parameter from R to IF2 may be made, with all the attendant advantages of the use of the latter index, in expressions relating R to ionospheric behavior based on the measured results of a particular period.Keywords
This publication has 6 references indexed in Scilit:
- An ionospheric prediction system based on the index IF2Journal of Atmospheric and Terrestrial Physics, 1968
- Study of Correlation of the Three Basic Indices of Ionospheric Propagation : R12, IF2 and ΦNature, 1966
- Variations in the relation between sunspot number and IF2Journal of Atmospheric and Terrestrial Physics, 1962
- Further evidence of a long term variation in the relationship of solar activity to the ionosphereJournal of Atmospheric and Terrestrial Physics, 1961
- A monthly ionospheric index of solar activity based on F2-layer ionisation at eleven stationsJournal of Atmospheric and Terrestrial Physics, 1960
- The Normal E Region of the IonosphereProceedings of the IRE, 1959