PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-05:12:30
G02     217.5          64.9                4.2 +/-    0.62       4.6 +/-    0.62  0.040 / 0.030
G06     55.1           75.1                2.5 +/-    0.86       2.6 +/-    0.86  0.030 / 0.040
G12     319.0          36.8                1.5 +/-    1.73       2.2 +/-    1.73  0.130 / 0.420
G17     58.8           31.9                1.8 +/-    0.69       3.0 +/-    0.69  0.140 / 0.430
G19     42.8           47.2                1.7 +/-    0.68       2.3 +/-    0.68  0.050 / 0.090
G24     263.3          40.9                5.6 +/-    1.20       8.0 +/-    1.20  0.060 / 0.090
G28     124.5          11.2                3.4 +/-    1.82       9.2 +/-    1.82  0.040 / 0.080