PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-07:27:50
G02     291.7          82.4                2.2 +/-    0.80       2.3 +/-    0.80  0.060 / 0.110
G05     168.1          24.0                5.4 +/-    1.19      10.8 +/-    1.19  0.090 / 0.130
G06     39.0           54.1                2.5 +/-    0.46       3.0 +/-    0.46  0.060 / 0.130
G12     320.0          58.7                2.8 +/-    1.05       3.3 +/-    1.05  0.090 / 0.120
G17     77.8           17.8                3.0 +/-    1.21       6.9 +/-    1.21  0.100 / 0.100
G19     65.9           33.0                2.3 +/-    0.96       3.8 +/-    0.96  0.090 / 0.130
G24     238.2          30.0                4.3 +/-    1.23       7.5 +/-    1.23  0.040 / 0.050
G25     317.8          19.1                3.1 +/-    0.91       7.0 +/-    0.91  0.030 / 0.040