PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-13:27:50
G03     226.9          66.0                5.4 +/-    0.89       5.9 +/-    0.89  0.200 / 0.420
G09     305.1          20.3                5.5 +/-    1.72      12.1 +/-    1.72  0.190 / 0.330
G14     100.7          16.4                6.8 +/-    2.36      16.4 +/-    2.36  0.050 / 0.060
G16     116.8          61.2                8.0 +/-    0.59       9.0 +/-    0.59  0.040 / 0.070
G22     188.1          49.1                7.6 +/-    2.13       9.7 +/-    2.13  0.030 / 0.060
G23     326.0          55.5                5.5 +/-    0.62       6.5 +/-    0.62  0.040 / 0.050
G26     62.7           48.4                5.3 +/-    0.57       6.8 +/-    0.57  0.030 / 0.050
G31     54.5           15.4                5.7 +/-    0.98      14.1 +/-    0.98  0.040 / 0.050