Di-Urnal variations
What are di-urnal variations?
This is essentially the difference between night-time, and daytime readings of the sensory data.
As the planet rotates, and we face the sun at varying times, to varying degrees, as the planet wobbles, and moves, there will be variations in the readings over the course of a period of time.
Other factors, such as sun-spot activity, will also effect the readings.
As we frequently point-out in understanding technically how the Schumann resonances work, and how this information is translated into an electric signal going down an antenna to be processed as sensory data to the filters, and processors; it is important to know physically the elements of the local environment which might be effecting the sensory readings.
Local interferences, is a general description of the understanding to look at the local environment, such as the local time of day. As Earth turns towards the sun, to face our nearest star, the ionosphere becomes much more active, increasing in to multiple layers. The main ionospheric layer is called "the D-layer".
Monitoring Schumann resonances
Daily and seasonal frequency variations
Journal of Atmospheric and Terrestrial Physics
September 1996, Pages 1483-1488
Abstract
The time variations of the Schumann resonance peak frequencies for the first three modes are presented in the vertical electric component measured in the Nagycenk Observatory (47.6°N, 16.7°E) from May 1993 to August 1994.
The average daily frequency patterns are different for the three modes, and each mode shows a distinct seasonal variation.
The recurrence of this seasonal variation is also shown.
The daily frequency range, in which the frequencies shift, is wider in winter than in summer in all three modes.
The mean frequency level also shows a seasonal variation in the third mode. A spring-autumn asymmetry has been found in case of the first mode.
Telluric Currents
