![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
ABSTRACT
Results of the fading characteristics of the radio waves reflected from the two different heights in the F-region of the ionosphere over Ahmedabad are described in this paper using the wave frequencies of 5·7 and 7·0 MHz. Fading rates and angular spread are found to be smaller for the reflections from the higher levels (at 7·0 MHz) compared to those for the reflections from the lower levels (at 7·0 MHz) which is attributed to the larger size of irregularities existing at higher levels of reflections. Magnitude of fading rate is found to be higher in summer compared to any other season. A linear relationship is observed between the fading rates of the reflected wave and horizontal drift speed of the irregularities. Variations in the daily sum of magnetic activity has no effect on the magnitude of the fading rate.