PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-01:42:40
G02     311.1          81.9                6.1 +/-    0.68       6.2 +/-    0.68  0.040 / 0.050
G05     166.1          27.5                8.7 +/-    0.81      16.0 +/-    0.81  0.030 / 0.030
G06     40.2           47.1                6.2 +/-    0.77       8.1 +/-    0.77  0.040 / 0.100
G12     318.8          63.4                6.8 +/-    1.56       7.5 +/-    1.56  0.050 / 0.110
G17     78.3           19.6               -8.0 +/-   17.89     -17.8 +/-   17.89  0.040 / 0.040
G19     67.8           32.4                7.3 +/-    0.55      12.2 +/-    0.55  0.040 / 0.040
G24     234.4          27.7                9.5 +/-    1.69      17.5 +/-    1.69  0.090 / 0.280
G25     317.8          21.4                5.4 +/-    2.22      11.5 +/-    2.22  0.100 / 0.220