Radio Propagation Indices References

Copyright WDC C1 for STP at RAL.

1. Minnis CM
   A new index of solar activity based on ionospheric measurements
   Journal of Atmospheric and Terrestrial Physics, volume 7, 1955, pages 310-321.
   

2. Minnis CM, Bazzard GH
   A monthly ionospheric index of solar activity based on F2-layer ionization at eleven stations
   Journal of Atmospheric and Terrestrial Physics, volume 18, 1960, pages 297-305.

3. Liu RY, Smith PA and King JW
   A new solar index which leads to improved foF2 predictions using the CCIR ATLAS
   Telecommunication Journal, 1983, Volume 50 (8), pages 408-414.