A new method of frequency analysis is presented in detail. This new method - Variable Sine Algorithmic Analysis, (VSAA) - is based on a single variable sine function and it is powered by the simplex algorithm. It is used in cases of phenomena triggered by a single mechanism, where Fourier Transform and Wavelet Analysis fail to describe practically and efficiently. Applications are given on the orbital period variation of two RS CVn type binaries: RS CVn itself and CG Cyg. With the use of the Applegate's mechanism, the variation of their subsurface magnetic field has been acquired.
@article{arxiv.0709.3224,
title = {Variable Sine Algorithmic Analysis (VSAA): A new method of frequency analysis - Applications},
author = {S. Tsantilas and H. Rovithis-Livaniou},
journal= {arXiv preprint arXiv:0709.3224},
year = {2007}
}