PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/12-00:12:40
G02     202.3          34.8               12.8 +/-    0.89      20.3 +/-    0.89  0.070 / 0.180
G06     161.7          67.8               11.1 +/-    0.49      11.9 +/-    0.49  0.120 / 0.280
G12     306.9          14.0                7.0 +/-    2.38      17.7 +/-    2.38  0.080 / 0.130
G17     30.2           53.7                9.1 +/-    0.84      10.9 +/-    0.84  0.090 / 0.130
G19     357.0          66.2                9.3 +/-    0.51      10.0 +/-    0.51  0.020 / 0.030
G24     299.5          37.3                8.8 +/-    3.20      13.4 +/-    3.20  0.040 / 0.040
G28     101.6          31.6                8.9 +/-    1.14      15.2 +/-    1.14  0.060 / 0.110