Conversational System of Spectrum Analysis by the Use of Graphic Display

Abstract

The spectral analysis system was made by the use of the computer HITAC M-160 II and the graphic display terminal, in order to analyze efficiently various kinds of wave data observed by Antarctic research, such as magnetic pulsations, natural electromagnetic waves, seismological waves and meteorological phenomena. The largest merit of the system is that it can analyze one- or two-dimensional time series data trial and error by the use of graphic display terminal. From the long original data one can choose easily a part of data for analysis, and freely use several kinds of filters and spectral methods. Generally used spectral methods, Blackman-Tukey, Fast Fourier Transform and Maximum-Entropy Method and the Chebyshev-filters, high-pass, low-pass, band-pass and band-reject are usable. In this paper, the system is outlined, and the spectral and filtered results of the test data are given and discussed.