Seasonal--daily variations in the electromagnetic background of the medium-frequency and high-frequency radio ranges during low solar activity

摘要

Based on the data of the long-term monitoring of the electromagnetic background at frequencies of 1-30 MHz in Tomsk, new main regularities of the daily and seasonal variations in this background in different frequency ranges at a low level of solar activity (the annual average values are 68.6 = F ^sub 10.7^ <= 80.9) have been established.[PUBLICATION ABSTRACT]