Preparation of a Dual Wavelength Sequence of High‐Resolution Solar Photospheric Images Using Phase Diversity

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Abstract
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 Å and wideband 4686 Å filtergrams was obtained with the 50 cm Swedish Vacuum Solar Telescope on the island of La Palma, Spain. The 29'' × 70'' field-of-view near disk center contains both an enhanced network region and an (apparently) nonmagnetic "quiet" region of granulation. The mean time between frames is 23.5 s. Each frame is created with partitioned phase-diverse speckle restoration of three realizations of the atmospheric turbulence acquired rapidly in sequence. The result is high-resolution movies of the solar photosphere, good enough to allow detection, tracking, and analysis of ~02 bright points. This analysis is the subject of a companion paper.

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