PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/06-20:43:00
G01     120.0          17.3               19.4 +/-    2.96      45.6 +/-    2.96  0.040 / 0.040
G07     77.0           67.4               14.5 +/-    0.60      15.6 +/-    0.60  0.050 / 0.050
G09     177.7          27.7               15.9 +/-    1.24      29.2 +/-    1.24  0.130 / 0.250
G11     110.8          39.5               16.3 +/-    0.72      23.9 +/-    0.72  0.270 / 0.290
G13     318.4          18.2               11.8 +/-    2.69      27.1 +/-    2.69  0.150 / 0.320
G17     202.7          19.9               19.8 +/-    2.22      43.6 +/-    2.22  0.220 / 0.300
G18     95.9           20.5               14.8 +/-    1.68      32.1 +/-    1.68  0.040 / 0.050
G28     291.7          57.2               13.8 +/-    1.51      16.1 +/-    1.51  0.060 / 0.060
G30     350.3          69.4               14.3 +/-    0.92      15.2 +/-    0.92  0.030 / 0.030