PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-18:57:40
G03     238.1          69.6               10.4 +/-    0.84      11.0 +/-    0.84  0.030 / 0.050
G09     301.3          14.9                8.3 +/-    1.71      20.8 +/-    1.71  0.030 / 0.050
G14     96.9           17.7               11.1 +/-    1.45      25.8 +/-    1.45  0.080 / 0.200
G16     133.2          56.6               14.2 +/-    0.86      16.6 +/-    0.86  0.090 / 0.190
G22     195.1          57.8               11.7 +/-    1.38      13.6 +/-    1.38  0.040 / 0.050
G23     318.0          47.9                8.8 +/-    1.09      11.3 +/-    1.09  0.050 / 0.050
G26     73.4           52.6               10.2 +/-    0.48      12.5 +/-    0.48  0.120 / 0.370
G31     50.9           21.4                7.0 +/-    1.03      14.9 +/-    1.03  0.100 / 0.510