nsfw:racy: Possible ocr: MDI INSTRUMENT SOl uses the Michelson Doppler Imager (MDI) instrument to probe the interior of the Sun by measuring the photospheric manitesta- tion of solar oscillations. MDI records the vertical motion of the Sun's surface at a million different points for each minute. Charac- teristics of the modes reveal the static and dynamic properties of the convection zone and core. Knowledge of these properties will improve our understanding of the solar cycle and of stellar evolu- tion. Other photospheric observations will contribute to our knowl- edge of the solar magnetic field. The data are partly ...
