PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/13-17:27:50
G03     233.8          69.5               12.8 +/-    0.50      13.6 +/-    0.50  0.050 / 0.040
G09     301.3          15.0                8.7 +/-    1.62      21.6 +/-    1.62  0.060 / 0.050
G14     96.6           18.3               10.6 +/-    1.59      24.2 +/-    1.59  0.090 / 0.210
G16     131.7          56.9               12.7 +/-    0.80      14.8 +/-    0.80  0.140 / 0.250
G22     193.5          57.0               13.3 +/-    0.81      15.5 +/-    0.81  0.170 / 0.240
G23     318.7          48.8                9.7 +/-    0.63      12.4 +/-    0.63  0.170 / 0.240
G26     72.7           52.2               12.4 +/-    0.75      15.3 +/-    0.75  0.030 / 0.030
G31     51.0           20.8                8.7 +/-    3.50      18.8 +/-    3.50  0.030 / 0.040