Mats G. Löfdahl & Göran B. Scharmer

Phase diverse speckle inversion applied to data from the Swedish
1-meter solar telescope

Proc. SPIE 4853-54, Innovative Telescopes and Instrumentation for
Solar Astrophysics, Keil & Avakyan, eds.

Abstract:

We report on the use of a new joint phase diverse speckle code, an
implementation of a method where a single object and individual
phases are estimated from several pairs of phase diverse data.  The
code was used on 430.5 nm G-band data collected with the newly
installed Swedish 1-meter solar telescope in La Palma, equipped with
a low-order adaptive optics system. We describe the algorithm
briefly, show wavefront statistics and object estimates from the
processing and discuss the results.  We demonstrate a resolution of
0.12 arc seconds for a time sequence and a large field of view,
which is a break-through for ground based solar telescopes.