PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-02:27:40
G01     42.1           17.7                3.4 +/-    1.78       7.8 +/-    1.78  0.040 / 0.050
G06     176.9          35.9                6.8 +/-    2.20      10.7 +/-    2.20  0.050 / 0.050
G13     239.9          23.2                6.6 +/-    1.95      13.5 +/-    1.95  0.130 / 0.260
G15     271.7          13.0                4.9 +/-    1.21      12.6 +/-    1.21  0.140 / 0.350
G17     352.2          72.6                5.3 +/-    0.38       5.6 +/-    0.38  0.070 / 0.130
G19     273.4          68.5                4.9 +/-    0.56       5.3 +/-    0.56  0.100 / 0.100
G24     317.3          17.2                1.3 +/-    4.76       3.1 +/-    4.76  0.020 / 0.030
G28     70.1           47.2                5.3 +/-    1.16       6.9 +/-    1.16  0.020 / 0.030
G30     153.0          25.5                6.8 +/-    1.68      13.1 +/-    1.68  0.060 / 0.180