PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-12:28:00
G01     94.0           30.8                4.0 +/-    0.96       6.9 +/-    0.96  0.020 / 0.030
G07     122.3          48.2                5.0 +/-    0.76       6.4 +/-    0.76  0.030 / 0.020
G11     71.2           40.2                4.6 +/-    0.88       6.7 +/-    0.88  0.040 / 0.040
G13     298.0          35.1                3.1 +/-    1.80       4.9 +/-    1.80  0.040 / 0.040
G17     211.6          51.8                6.4 +/-    0.80       7.9 +/-    0.80  0.100 / 0.140
G18     66.6           24.1                4.5 +/-    1.20       9.0 +/-    1.20  0.100 / 0.110
G19     213.5          20.7                4.7 +/-    2.46      10.2 +/-    2.46  0.080 / 0.100
G28     341.9          61.9                3.5 +/-    0.57       3.9 +/-    0.57  0.080 / 0.080
G30     84.1           79.5                4.8 +/-    0.84       4.8 +/-    0.84  0.060 / 0.130