Analysis of chromatic effects in the shift-and-add method

Abstract

Chromatic effects in shift-and-add (SAA) adaptive systems are considered by means of computer simulations. Chromatic eects under investigations arise when measurements and corrections are performed in dierent wavelengths. A study of chromatic properties of SAA technique is useful for designing of SAA adaptive systems. Also it is important for data reduction of speckle-spectroscopic observations. The comparison of two approaches of low order adaptive corrections (SAA and tip-tilt) is presented. The advantages of SAA adaptive systems are outlined.