PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/13-12:27:30
G02     202.1          30.7                8.0 +/-    2.06      13.7 +/-    2.06  0.170 / 0.360
G06     168.1          63.7                7.9 +/-    0.71       8.8 +/-    0.71  0.220 / 0.290
G12     305.5          11.8                0.7 +/-    7.73       2.0 +/-    7.73  0.090 / 0.120
G17     35.0           50.1                2.7 +/-    0.96       3.4 +/-    0.96  0.080 / 0.120
G19     358.1          66.6                3.3 +/-    0.56       3.6 +/-    0.56  0.060 / 0.100
G24     303.3          35.0                3.5 +/-    0.97       5.5 +/-    0.97  0.050 / 0.100
G28     99.4           33.0                3.5 +/-    1.08       5.7 +/-    1.08  0.030 / 0.060