An Algorithm for Inter-frequency Bias Calibration and Application to WAAS Ionosphere ModelingSep 1, 1995·Yi-Chung Chao,Yeou-Jyh Tsai,Todd WalterChangdon Kee,Per Enge,Brad Parkinson· 0 min readLast updated on Sep 1, 1995 AuthorsChangdon KeeProfessor Emeritus← Wide Area Differential GPS (WADGPS) as a Future Navigation System in the United States Apr 1, 1996Validation of the RTCA Message Format for WAAS Sep 1, 1995 →