Wide Area Differential GPS as a Future Navigation System in the U. S.Apr 1, 1994·Changdon Kee,Parkinson,B. W.· 0 min readLast updated on Apr 1, 1994 AuthorsChangdon KeeProfessor Emeritus← Flight Trials of the Wide-Area Augmentation System (WAAS) Sep 1, 1994Static Test Results of Wide Area Differential GPS Sep 1, 1993 →