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Appendix D: Analysis of Wavelength and Angle Dependence of Speckle

Our goal in this appendix is to find the cross-correlation of an observed complex speckle field A(x1, y1) and a second complex speckle field A(x2, y2), where the differences between A1 and A2 arise due to changes of wavelength, angle of illumination, and/or angle of observation. Two different geometries are considered, free space and imaging.