PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-21:57:30
G07     331.0          57.1               12.4 +/-    0.65      14.5 +/-    0.65  0.090 / 0.190
G08     104.8          52.1               14.1 +/-    0.68      17.4 +/-    0.68  0.100 / 0.150
G09     197.1          75.5               15.3 +/-    0.92      15.8 +/-    0.92  0.060 / 0.100
G11     148.9          11.6               22.9 +/-    4.97      61.8 +/-    4.97  0.050 / 0.090
G23     154.6          41.0               14.9 +/-    0.77      21.3 +/-    0.77  0.040 / 0.040
G27     55.3           31.6               10.7 +/-    1.40      18.2 +/-    1.40  0.040 / 0.040
G28     236.9          29.4               14.2 +/-    1.22      25.2 +/-    1.22  0.030 / 0.050
G30     303.6          37.8               11.4 +/-    1.03      17.1 +/-    1.03  0.030 / 0.050