PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-18:28:10
G02     219.7          61.9               12.1 +/-    1.31      13.5 +/-    1.31  0.070 / 0.080
G06     49.7           69.3               10.7 +/-    0.51      11.4 +/-    0.51  0.110 / 0.090
G12     320.7          42.7                9.0 +/-    1.05      12.5 +/-    1.05  0.040 / 0.060
G17     60.4           30.0                9.3 +/-    1.37      16.2 +/-    1.37  0.030 / 0.060
G19     40.3           49.2                9.2 +/-    1.11      11.7 +/-    1.11  0.040 / 0.020
G24     258.9          40.8               12.1 +/-    4.86      17.4 +/-    4.86  0.040 / 0.030
G28     124.9          11.1               11.1 +/-    2.77      30.3 +/-    2.77  0.040 / 0.050