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"Groundwave propagation on 11 meters???? REALLY?"


GROUND-WAVE PROPAGATION CURVES FOR FREQUENCIES

BETWEEN 10 kHz AND 30 MHz. over 11 different types of signal-path soil conditions.


the propagation curves in this recommendation are calculated based on the assumption that both the transmitting and the receiving antennas are at ground level.


http://www.itu.int/dms_pubrec/itu-r/rec/p/R-REC-P.368-8-200503-S!!PDF-E.pdf