PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/30-15:13:00
G02     45.0           45.1                7.7 +/-    0.53      10.3 +/-    0.53  0.030 / 0.040
G05     113.5          69.8               10.2 +/-    0.57      10.8 +/-    0.57  0.020 / 0.030
G12     191.7          54.2               12.7 +/-    1.73      15.2 +/-    1.73  0.040 / 0.050
G20     201.1          38.7               12.9 +/-    1.59      19.2 +/-    1.59  0.040 / 0.050
G25     270.4          59.0               12.3 +/-    0.76      14.1 +/-    0.76  0.050 / 0.110
G29     319.8          43.5                8.3 +/-    0.82      11.5 +/-    0.82  0.060 / 0.100