PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-17:12:30
G02     201.9          24.9               12.8 +/-    3.38      25.0 +/-    3.38  0.170 / 0.380
G06     164.5          61.9               11.8 +/-    0.73      13.2 +/-    0.73  0.150 / 0.320
G12     304.0          12.3                9.0 +/-    3.56      23.8 +/-    3.56  0.180 / 0.150
G17     28.2           55.2               10.0 +/-    0.99      11.9 +/-    0.99  0.150 / 0.120
G19     331.9          69.5               10.1 +/-    0.41      10.7 +/-    0.41  0.200 / 0.240
G24     304.7          34.6                9.7 +/-    2.30      15.6 +/-    2.30  0.110 / 0.190
G28     94.3           36.3               11.5 +/-    0.81      17.8 +/-    0.81  0.050 / 0.040
G30     158.0          10.0               10.0 +/-    3.76      27.8 +/-    3.76  0.060 / 0.040