Personal communication system geographical test data correlation

A method for correlating data taken during two test drives through the coverage area of a personal communication system, the data from each test set including a sequence of locations along a drive, a location from the first set being correlated with a location from the second set when the location from the second set is within a correlation distance from the location from the first set, the method including determining the correlation distance; setting the search point as a location in first set; determining a possible first correlated location from the first set and a corresponding first correlated location from the second set using the search point, the correlation distance, and a search radius if no correlated data has yet been found; otherwise determining a possible next correlated location from the first set and a corresponding next correlated location from the second set using the search point, the correlation distance, the correlated location from the second set that was most recently found, and a search number. The effects of data taken during slow or halted movement are reduced by averaging or discounting locations. The effects of changing environmental variables may be reduced by determining at least one data variable that should have remained constant between data for correlated locations and, for each geographically correlated pair, determining any difference between data values for one of these variables, and compensating data from the correlated pair using the determined difference.