CONTENTS

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 d_max
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 (OWF)
8 Prediction of the highest probable frequency (HPF)
9 Computer program
Annex 2 - Prediction of ray path