PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/30-13:27:50
G01     105.0          26.6                6.8 +/-    1.43      12.8 +/-    1.43  0.030 / 0.030
G07     110.0          56.7                6.0 +/-    0.70       7.0 +/-    0.70  0.020 / 0.030
G08     41.6           17.5                4.4 +/-    0.84      10.4 +/-    0.84  0.070 / 0.140
G11     85.0           42.5                5.8 +/-    0.59       8.1 +/-    0.59  0.070 / 0.120
G13     307.8          30.1                5.6 +/-    1.66       9.8 +/-    1.66  0.040 / 0.050
G17     206.5          40.5                7.2 +/-    1.98      10.4 +/-    1.98  0.040 / 0.060
G18     77.7           24.4                5.4 +/-    0.92      10.7 +/-    0.92  0.040 / 0.090
G28     321.6          61.2                4.4 +/-    1.06       4.9 +/-    1.06  0.040 / 0.090
G30     26.8           78.9                5.0 +/-    0.46       5.1 +/-    0.46  0.040 / 0.040