Meteorological Influences on Long-Distance, Long-Wave Reception

(1) The received field intensity was less affected by the variations of the meteorological elements in the environs of transmitting stations than by those of the receiving station. (2) The field intensities for both daylight and night reception varied inversely with the changes of atmospheric temperature and absolute humidity on the receiving side. This was in agreement with the daylight results obtained by Austin and Minohara. (3) The intensity-pressure relation was not found to be so apparent as in the case of (2), though in the monthly average variations the field intensity seemed to have direct relation with atmospheric pressure in summer and inverse relation in winter. (4) The influence of weather on the field intensity was found to be still less clear than in the cases of the above-mentioned three meteorological elements.