SPECKLE INTERFEROMETRY AT THE U.S. NAVAL OBSERVATORY. XV

Results of 2433 intensified CCD observations of double stars, made with the 26 inch refractor of the U.S. Naval Observatory, are presented. Each observation of a system represents a combination of over 2000 short-exposure images. These observations are averaged into 1013 mean relative positions and range in separation from 096 to 5805, with a mean separation of 1350. This paper is the 15th in the series of papers and covers the period 2008 January 3 through 2008 December 21.