PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-18:57:50
G03     238.1          69.6               10.7 +/-    1.07      11.3 +/-    1.07  0.050 / 0.040
G09     301.3          14.9                7.6 +/-    1.41      18.8 +/-    1.41  0.040 / 0.050
G14     96.9           17.7               10.4 +/-    1.91      24.3 +/-    1.91  0.150 / 0.250
G16     133.2          56.6               13.0 +/-    0.79      15.3 +/-    0.79  0.130 / 0.210
G22     195.1          57.8               10.7 +/-    0.75      12.3 +/-    0.75  0.030 / 0.050
G23     318.0          47.9               10.3 +/-    1.51      13.3 +/-    1.51  0.030 / 0.040
G26     73.4           52.6                9.8 +/-    0.61      12.0 +/-    0.61  0.100 / 0.210
G31     50.9           21.4                8.3 +/-    2.87      17.7 +/-    2.87  0.090 / 0.230