PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/31-17:27:40
G10     251.5          27.9                9.5 +/-    1.37      17.4 +/-    1.37  0.060 / 0.080
G13     52.4           29.0               10.5 +/-    2.85      18.7 +/-    2.85  0.090 / 0.070
G15     89.4           59.0               10.8 +/-    1.33      12.4 +/-    1.33  0.180 / 0.700
G16     294.9          15.4                7.4 +/-    2.05      18.3 +/-    2.05  0.190 / 0.720
G20     271.3          51.5               12.8 +/-    2.79      15.8 +/-    2.79  0.090 / 0.190
G21     337.4          61.8               10.4 +/-    1.02      11.6 +/-    1.02  0.090 / 0.210
G26     267.9          15.0               10.5 +/-    1.74      26.1 +/-    1.74  0.050 / 0.080
G29     164.4          48.5                9.5 +/-    1.55      12.1 +/-    1.55  0.040 / 0.060