PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-04:57:30
G07     351.2          63.4                3.5 +/-    0.43       3.8 +/-    0.43  0.090 / 0.090
G08     80.4           51.8                4.9 +/-    0.81       6.1 +/-    0.81  0.070 / 0.080
G09     183.0          63.0                5.5 +/-    1.17       6.0 +/-    1.17  0.040 / 0.030
G11     138.9          19.0                7.8 +/-    1.68      17.6 +/-    1.68  0.030 / 0.030
G23     158.6          32.8                7.2 +/-    1.12      11.8 +/-    1.12  0.040 / 0.030
G27     46.4           24.9                3.5 +/-    1.88       6.9 +/-    1.88  0.030 / 0.030
G28     246.4          37.8                5.5 +/-    1.79       8.4 +/-    1.79  0.080 / 0.100
G30     310.4          42.2                3.0 +/-    1.20       4.2 +/-    1.20  0.100 / 0.170