PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-18:57:50
G07     40.4           69.8               13.0 +/-    0.56      13.8 +/-    0.56  0.160 / 0.290
G08     55.7           45.4               12.5 +/-    0.68      16.7 +/-    0.68  0.190 / 0.300
G09     179.1          40.3               15.7 +/-    1.18      22.7 +/-    1.18  0.060 / 0.050
G11     123.7          32.9               14.4 +/-    1.29      23.8 +/-    1.29  0.050 / 0.050
G18     107.5          14.8               14.4 +/-    1.83      36.0 +/-    1.83  0.030 / 0.030
G28     271.5          51.3               15.2 +/-    3.29      18.8 +/-    3.29  0.030 / 0.040
G30     331.1          59.0               11.8 +/-    0.96      13.5 +/-    0.96  0.030 / 0.040