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Graphical curves and text tables are presented that map out time and space distortions for data obtained from film records of the Many Beam Fabry Perot Velocimeter. Effective distortion corrections extracted from these mappings can be applied to upcoming velocimetry experiments, but only with limited success over periods of a year or more into the future. A method of using three fiducials to provide fresh time and space distortion data on each film record is presented as a more reliable procedure to correct distortions to an acceptable level of accuracy.

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A theoretical analysis has been performed in order to determine optical homodyne signal strength as a function of path length difference between coherent spherical reference and signal waves. Signal strength is found to decrease with increasing path length mismatch. Experimental verification of the results are also given, along with methods for minimizing the detrimental effect of wavefront curvature.