PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-17:57:40
G02     220.5          62.4               13.6 +/-    1.74      15.2 +/-    1.74  0.100 / 0.090
G06     48.6           68.4               13.1 +/-    0.43      14.0 +/-    0.43  0.080 / 0.080
G12     321.0          43.8               10.7 +/-    0.85      14.7 +/-    0.85  0.040 / 0.060
G17     61.3           29.2                9.6 +/-    1.13      17.1 +/-    1.13  0.040 / 0.050
G19     41.0           48.8               11.7 +/-    1.22      14.9 +/-    1.22  0.030 / 0.030
G24     257.7          40.5               12.5 +/-    4.51      18.0 +/-    4.51  0.030 / 0.030
G28     125.4          10.5               11.8 +/-    2.28      32.5 +/-    2.28  0.040 / 0.070