RECOMMENDATION ITU-R P.1240 - ITU-R METHODS OF BASIC MUF, OPERATIONAL MUF AND RAY-PATH ... 
ANNEX 1 - Prediction of basic and operational MUFs
1 Introduction
2 Mode consideration
3 Prediction of F2-layer basic MUF
    3.1 Ground distance D up to dmax
    3.2 Ground distance D greater than dmax
4 Prediction of F1-layer basic MUF
5 Prediction of E-layer basic MUF
    5.1 Ground distance up to 2 000 km
    5.2 Ground distance between 2 000 and 4 000 km
6 Prediction of the operational MUF
7 Prediction of the optimum working frequency
8 Computer program
ANNEX 2 - Prediction of ray path