PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/20-01:13:00
G02     242.1          77.0                9.8 +/-    0.81      10.0 +/-    0.81  0.040 / 0.070
G05     170.8          16.8               14.2 +/-    1.85      33.8 +/-    1.85  0.040 / 0.070
G06     40.7           58.7                8.0 +/-    0.86       9.1 +/-    0.86  0.080 / 0.170
G12     321.5          51.3               10.2 +/-    1.29      12.6 +/-    1.29  0.060 / 0.150
G17     68.4           26.6                7.2 +/-    1.13      13.5 +/-    1.13  0.150 / 0.360
G19     56.2           39.6                8.8 +/-    0.72      12.8 +/-    0.72  0.260 / 0.370
G24     245.8          35.0               12.7 +/-    0.92      20.1 +/-    0.92  0.110 / 0.090
G25     316.6          11.2               -5.9 +/-   33.52     -16.0 +/-   33.52  0.090 / 0.120