PREPARATION OF A DUAL-WAVELENGTH SEQUENCE OF HIGH-RESOLUTION SOLAR PHOTOSPHERIC IMAGES USING PHASE-DIVERSITY

The collection, seeing compensation, and temporal filtering of a high- resolution time-sequence of solar photospheric images is described. A 70 minute time series of cospatial and cotemporal G band 4305 Angstrom and wideband 4686 Angstrom filtergrams was obtained with the 50 cm Sw edish Vacuum Solar Telescope on the island of La Palma, Spain. The 29 '' x 70 '' field-of-view near disk center contains both an enhanced ne twork region and an (apparently) nonmagnetic ''quiet'' region of granu lation. The mean time between frames is 23.5 s. Each frame is created with partitioned phase-diverse speckle restoration of three realizatio ns of the atmospheric turbulence acquired rapidly in sequence. The res ult is high-resolution movies of the solar photosphere, good enough to allow detection, tracking, and analysis of similar to 0.'' 2 bright p oints. This analysis is the subject of a companion paper.