PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/10-17:57:50
G01     129.3          9.9               -11.1 +/-   35.57     -31.1 +/-   35.57  0.050 / 0.040
G07     42.4           69.9               12.4 +/-    0.51      13.1 +/-    0.51  0.040 / 0.040
G08     54.5           44.2               11.0 +/-    0.52      15.0 +/-    0.52  0.030 / 0.040
G09     178.8          39.4               14.1 +/-    1.12      20.8 +/-    1.12  0.030 / 0.030
G11     122.6          33.3               13.5 +/-    2.05      22.1 +/-    2.05  0.030 / 0.030
G18     106.9          15.2               13.7 +/-    1.77      33.9 +/-    1.77  0.030 / 0.030
G28     272.3          51.6               12.5 +/-    2.84      15.4 +/-    2.84  0.130 / 0.350
G30     331.2          59.1               10.9 +/-    0.77      12.5 +/-    0.77  0.240 / 0.330