PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-11:12:50
G01     120.4          16.8                4.7 +/-    1.66      11.2 +/-    1.66  0.030 / 0.030
G07     76.7           67.1                5.3 +/-    0.96       5.7 +/-    0.96  0.030 / 0.030
G08     44.9           30.8                3.0 +/-    1.71       5.1 +/-    1.71  0.030 / 0.030
G09     175.3          25.2                5.6 +/-    1.84      10.8 +/-    1.84  0.030 / 0.030
G11     107.0          39.3                5.4 +/-    0.80       7.9 +/-    0.80  0.090 / 0.210
G13     318.3          18.5                1.0 +/-    2.52       2.2 +/-    2.52  0.110 / 0.190
G17     200.6          24.5                4.5 +/-    2.61       9.0 +/-    2.61  0.140 / 0.180
G18     95.2           20.1                3.3 +/-    1.35       7.2 +/-    1.35  0.120 / 0.160
G28     289.3          56.6                4.5 +/-    1.76       5.3 +/-    1.76  0.080 / 0.150
G30     340.5          65.9                5.3 +/-    1.33       5.7 +/-    1.33  0.130 / 0.190