PPT Slide
Digisonde Drift Analysis (DDA) calculates a 3-D velocity vector using the assumption of spatial uniformity. (Common technique used for velocity calculations.) [Inconsistent]
Generalized Digisonde Drift Analysis (GDDA) uses combination analysis to calculate the full velocity field distribution. Given a set of “N sources”, and selecting “r” at a time to calculate a velocity, NCr velocities are calculated. Combination of sources from a dominant plasma motion would produce similar velocities, while combinations of sources from different plasma motions would result in random motions. The resultant distribution would map out a velocity field. [Consistent]
Generalized Digisonde Drift Analysis