The Effect Of Ultra-Low Frequency (Ulf) Waves On The Ionosphere

Abstract

space physics takes special and significant part of our everyday live, lots of books and papers have been published lately because of its importance and great effect on the ground. Solar wind with all what it carries from particles and waves is very important to be studied and well known by students. Ultra low frequency waves is one of what solar wind generates, these waves have a great effect on many things. This dissertation is about the interaction of both ultra low frequency waves and ionosphere with each other. Ultra low frequency waves have been studied for long time, they are detected on the ground and they play a significant role on characteristics of the ionosphere. So the problem of this dissertation is how to observe this role and to study their effect on the ionosphere. Part of the data of this dissertation were collected from Canadian High Arctic Ionospheric Network (CHAIN). Results show amplitudes peaks on magnetometer's data on two different days, they show two peaks on the day of Oct 11, 2009 around 8:00 am, and 15:00 pm hours; and one peak on the day of Jan 20, 2010 around 17:00 pm hour. Results also show peaks on the same days at the same times in the time series concentration of the signal from the data of GPS (S4 index), in addition they show corresponding drift velocities on ionogram data of ionosondes. In conclusion: by observations using ionospheric parameters data from ground GPS receivers data and the ionosondes data that corresponds to DST index data, the effect of ULF on the ionosphere was confirmed here.