Velocity and Intensity Spectra from MDI and GONG

Velocity (V) and Intensity (I) power spectra, phase difference and coherence for 61 days (97 Apr. 12-97 June 12) rotation corrected m-average MDI data corresponding to l=50
Velocity (V) and Intensity (I) power spectra, phase difference and coherence for 9 GONG months (96 Oct. 28-97 Sept. 16) rotation corrected m-average MDI data corresponding to l=50

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