PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-09:42:40
G07     324.7          54.8                2.5 +/-    0.54       3.0 +/-    0.54  0.130 / 0.130
G08     105.5          49.5                4.8 +/-    0.47       6.1 +/-    0.47  0.090 / 0.110
G09     192.1          77.8                3.4 +/-    0.40       3.5 +/-    0.40  0.030 / 0.030
G11     148.4          10.0               -5.1 +/-    9.83     -14.1 +/-    9.83  0.030 / 0.040
G16     45.4           9.4                 1.8 +/-    2.54       5.1 +/-    2.54  0.060 / 0.050
G23     153.6          48.8                5.3 +/-    0.67       6.7 +/-    0.67  0.070 / 0.060
G27     61.6           34.6                3.9 +/-    0.88       6.2 +/-    0.88  0.030 / 0.050
G28     232.7          24.4                4.5 +/-    2.84       8.8 +/-    2.84  0.030 / 0.050
G30     296.3          29.7                4.1 +/-    2.23       7.3 +/-    2.23  0.110 / 0.600