PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-13:58:10
G01     118.0          17.7                7.5 +/-    0.85      17.4 +/-    0.85  0.030 / 0.050
G07     87.9           62.7                8.3 +/-    0.62       9.2 +/-    0.62  0.030 / 0.040
G08     45.5           33.2                6.5 +/-    0.58      10.7 +/-    0.58  0.080 / 0.120
G09     177.5          27.0                9.1 +/-    2.02      17.1 +/-    2.02  0.080 / 0.140
G11     106.1          40.9                8.9 +/-    1.31      12.7 +/-    1.31  0.110 / 0.280
G13     317.1          20.7                7.7 +/-    2.92      16.6 +/-    2.92  0.110 / 0.340
G17     201.7          22.6                8.4 +/-    1.97      17.3 +/-    1.97  0.040 / 0.060
G18     92.8           20.9                8.0 +/-    0.57      17.1 +/-    0.57  0.040 / 0.070
G28     284.7          53.6                8.1 +/-    0.88       9.8 +/-    0.88  0.050 / 0.080
G30     351.8          70.5                7.3 +/-    1.03       7.7 +/-    1.03  0.060 / 0.080