PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/20-10:27:50
G01     118.4          17.1                3.0 +/-    1.19       7.2 +/-    1.19  0.030 / 0.040
G07     83.2           64.7                5.1 +/-    0.77       5.6 +/-    0.77  0.030 / 0.040
G08     46.8           36.1                2.8 +/-    0.67       4.3 +/-    0.67  0.130 / 0.230
G09     176.9          27.2                6.3 +/-    2.94      11.6 +/-    2.94  0.120 / 0.260
G11     108.7          40.7                5.3 +/-    0.96       7.6 +/-    0.96  0.050 / 0.080
G13     317.5          20.0                3.4 +/-    1.27       7.4 +/-    1.27  0.050 / 0.080
G17     201.9          20.3                4.6 +/-    1.97      10.0 +/-    1.97  0.110 / 0.360
G18     94.2           20.6                3.9 +/-    0.67       8.5 +/-    0.67  0.110 / 0.430
G28     282.0          52.4                5.4 +/-    0.92       6.6 +/-    0.92  0.070 / 0.190
G30     344.0          67.9                2.5 +/-    0.87       2.7 +/-    0.87  0.080 / 0.170