PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-22:28:10
G02     220.7          65.5               13.2 +/-    0.93      14.4 +/-    0.93  0.040 / 0.080
G06     48.3           69.1               12.0 +/-    0.38      12.8 +/-    0.38  0.040 / 0.060
G12     320.2          41.4               10.8 +/-    0.85      15.3 +/-    0.85  0.060 / 0.090
G17     59.9           31.7               10.7 +/-    0.35      18.1 +/-    0.35  0.050 / 0.090
G19     43.2           47.3               10.9 +/-    0.49      14.3 +/-    0.49  0.040 / 0.050
G24     258.6          40.2               13.0 +/-    0.89      18.8 +/-    0.89  0.050 / 0.050
G28     125.8          9.8                15.8 +/-    2.46      44.3 +/-    2.46  0.150 / 0.390