RECOMMENDATION ITU-R P.684-2 - Prediction of field strength at frequencies below about 150 kHz
1 Introduction
2 Wave-hop propagation theory
    2.1 General description
    2.2 Calculating the ray-path field strength
3 Calculating field strength by waveguide modes: full wave solution
    3.1 The ionospheric reflection matrix, R ...
    3.2 The ground reflection matrix, ...
    3.3 The mode finding method ("MODESRCH")
4 Calculation of field strength
    4.1 Required parameters
    4.2 WKB and horizontally homogeneous mode sums
    4.3 Mode sums using mode conversion
    4.4 Ionospheric parameters
    4.5 Geomagnetic and geophysical parameters
5. Discussion
ANNEX 1 -  Example of a complete calculation of field in amplitude and phase using the wave-hop method of § 2
ANNEX 2 -  Accuracy of the methods
ANNEX 3 -  Some example calculations using the waveguide mode method