PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-13:27:40
G03     235.7          68.4                9.7 +/-    0.56      10.4 +/-    0.56  0.100 / 0.250
G09     303.0          17.5                6.1 +/-    1.86      14.4 +/-    1.86  0.100 / 0.220
G14     97.8           18.7                8.0 +/-    2.71      18.1 +/-    2.71  0.070 / 0.060
G16     124.4          59.0               11.7 +/-    0.40      13.5 +/-    0.40  0.060 / 0.050
G22     189.6          52.9               10.1 +/-    0.71      12.4 +/-    0.71  0.040 / 0.030
G23     322.8          52.7                8.4 +/-    0.48      10.2 +/-    0.48  0.040 / 0.030
G26     67.7           50.4                9.0 +/-    0.86      11.2 +/-    0.86  0.050 / 0.030
G31     52.6           18.1                6.7 +/-    3.68      15.5 +/-    3.68  0.050 / 0.030