Cross-Correlation and Cross-Spectral Methods for Drift Velocity Measurements

Cross-correlation and cross-spectral methods are used in a laboratory modeling experiment to compute the drift velocity of a structure which undergoes internal rearrangement as it drifts in a uniform direction. Emphasis is placed on the problems of making such measurements in remote probing experiments, particularly in the study of irregularities in the solar wind plasma by radio star scintillation techniques, where the number of observing sites is limited to two or three.