Static Test Results of Wide Area Differential GPS Sep 1, 1993· Changdon Kee , Parkinson , B. W · 0 min read Last updated on Sep 1, 1993 Authors Changdon Kee Professor ← Wide Area Differential GPS as a Future Navigation System in the U. S. Apr 1, 1994 High Accuracy GPS Positioning in the Continent: Wide Area Differential GPS Apr 1, 1993 →