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                4.3 +/-    1.26       4.7 +/-    1.26  0.360 / 0.370
G06     55.1           75.1                3.4 +/-    0.40       3.5 +/-    0.40  0.240 / 0.400
G12     319.0          36.8                2.7 +/-    1.78       4.1 +/-    1.78  0.060 / 0.090
G17     58.8           31.9                2.0 +/-    1.10       3.4 +/-    1.10  0.040 / 0.070
G19     42.8           47.2                2.7 +/-    0.83       3.5 +/-    0.83  0.040 / 0.030
G24     263.3          40.9                4.1 +/-    3.12       5.9 +/-    3.12  0.040 / 0.030
G28     124.5          11.2                5.7 +/-    6.32      15.4 +/-    6.32  0.070 / 0.070