1. A method for retrieving corrected individual measurements from a series of sequentially pairwise-combined measurements comprising: providing an initial estimate for a first one of the corrected individual measurements; deriving temporary estimates for other ones of the corrected individual measurements by subtracting the initial estimate from the first sequentially pairwise-combined measurements to produce an estimate for a second one of the corrected individual measurements, and repeating the subtraction from each of the next sequentially pairwise-combined measurements until temporary estimates for each of the corrected individual measurements are obtained; and correcting errors in the temporary estimates to generate error-corrected estimates by filtering an alternating error component associated with the initial estimate.