Wide-field Speckle Imaging from Both Hemispheres

Although speckle imaging has been used in astronomy since the 1970s, it remains a somewhat mysterious method to many astronomers. At its essence, the reduction of speckle data is in the category of deconvolution problems in mathematics: the atmosphere acts as a linear, if complicated, operator on the image itself, and so this permits the deconvolution of the image if the point spread function (PSF) is sufficiently well known. Ideally, one would have an isolated point source very close to the object of interest and one could take speckle data simultaneously of both. However, the approximation of linearity only works over a small patch of sky, and usually there is not a bright point source close enough to the target of interest to satisfy this requiremen