PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/22-16:12:30
G02     219.4          60.2                8.6 +/-    1.57       9.7 +/-    1.57  0.070 / 0.060
G06     50.1           69.2                9.3 +/-    0.91       9.9 +/-    0.91  0.070 / 0.060
G12     321.0          43.8                8.5 +/-    1.70      11.7 +/-    1.70  0.100 / 0.080
G17     60.9           28.9                7.0 +/-    0.79      12.6 +/-    0.79  0.060 / 0.090
G19     38.8           50.0                8.3 +/-    0.62      10.4 +/-    0.62  0.080 / 0.370
G24     258.8          41.0               11.4 +/-    1.79      16.3 +/-    1.79  0.070 / 0.390
G28     124.5          11.6                7.9 +/-    2.32      21.3 +/-    2.32  0.030 / 0.040