DETAILED SPECTRAL-ANALYSIS OF JUPITER GREAT RED SPOT - RELATIVE INTENSITIES FOR THE PERIOD 1963-1967

Maximum entropy analysis, the power spectrum (smoothed spectrum using the Blackman-Tukey window), Fourier spectral analysis and autocorrelat ion have been used to detect periodicities in the variation of Jupiter 's Great Red Spot (GRS) relative intensities for the time period 1963- 1967, referred to the 4300 (D43), 5500 (D55) and 6400 Angstrom (D64) w avelengths. Periods ranging between 2 and 50 months have been obtained . Various tests of significance and stationarity of the obtained perio ds were applied to examine the reliability and variability of the peri odic components. The results of these quasi-periodicities are discusse d in relation to the solar wind and Jovian atmospheric features.