Epicenter localization using RDOA based RLS algorithm

In this paper, we propose an epicenter measurement using a laser interferometer. The laser interferometer system is an equipment with its extraordinary accurate capability for displacement measurement. The seismic signal is measured in the observation as P-wave and S-wave form. The seismic signal is indicated as in a form of intensity signal which is represented as a trigonometrical function using the heterodyne laser interferomter. The epicenter can be derived by P-S time which can be determined by intensity signal. With a range difference of arrival (RDOA) method, we can estimate the epicenter location from the distance data between the epicenter and the observatory. We suggest a recursive least square (RLS) algorithm to obtain a solution that minimizes estimation error value. Through some simulations, we prove the performance of the proposed method.