PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-06:57:40
G03     229.0          64.6                4.4 +/-    0.84       4.9 +/-    0.84  0.040 / 0.070
G07     251.9          11.0                1.2 +/-   10.74       3.2 +/-   10.74  0.040 / 0.060
G09     307.8          25.4                0.6 +/-    1.36       1.1 +/-    1.36  0.120 / 0.410
G14     104.2          11.4                2.3 +/-    1.89       6.1 +/-    1.89  0.090 / 0.390
G16     107.0          62.3                4.4 +/-    0.72       4.9 +/-    0.72  0.130 / 0.540
G22     193.1          49.8                4.5 +/-    1.78       5.6 +/-    1.78  0.130 / 0.520
G23     323.5          53.5                3.9 +/-    1.19       4.7 +/-    1.19  0.050 / 0.080
G26     58.8           46.2                2.9 +/-    0.48       3.8 +/-    0.48  0.040 / 0.050
G31     56.1           13.1                1.6 +/-    1.01       4.2 +/-    1.01  0.040 / 0.050