This method predicts values of the night-time sky-wave field strength for a given power radiated from one or
more vertical antennas, when measured by a loop antenna at ground level aligned in a vertical plane along the greatcircle path to the transmitter
ITU-R PI.1059-1994 history
1994ITU-R PI.1059-1994 (WITHDRAWN) Method for Predicting Sky-Wave Field Strength in the Frequency Range 1 605 to 1 705 kHz