PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-19:12:40
G02     86.1           13.9                9.9 +/-    1.16      25.2 +/-    1.16  0.090 / 0.080
G05     45.1           30.7                9.1 +/-    0.86      15.7 +/-    0.86  0.080 / 0.100
G13     92.4           34.7               10.9 +/-    0.41      17.4 +/-    0.41  0.050 / 0.110
G15     147.1          40.2               11.5 +/-    0.61      16.6 +/-    0.61  0.050 / 0.110
G20     237.5          26.6               11.0 +/-    1.28      20.7 +/-    1.28  0.090 / 0.210
G21     301.3          38.7               10.0 +/-    0.94      14.8 +/-    0.94  0.080 / 0.210
G25     204.3          20.6                9.1 +/-    1.88      19.6 +/-    1.88  0.080 / 0.130
G26     300.4          19.7               10.6 +/-    1.74      23.4 +/-    1.74  0.090 / 0.120
G29     101.3          87.1               10.6 +/-    0.55      10.6 +/-    0.55  0.040 / 0.080