PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/03-20:27:50
G01     72.7           33.2               12.1 +/-    0.71      19.9 +/-    0.71  0.080 / 0.290
G07     136.5          32.9               14.2 +/-    0.68      23.4 +/-    0.68  0.110 / 0.320
G11     55.7           32.8               10.1 +/-    0.88      16.7 +/-    0.88  0.040 / 0.070
G13     276.8          37.6               13.4 +/-    1.06      20.4 +/-    1.06  0.040 / 0.090
G15     304.1          14.9                9.9 +/-    1.67      24.8 +/-    1.67  0.040 / 0.090
G17     229.7          63.5               15.0 +/-    0.63      16.6 +/-    0.63  0.060 / 0.090
G18     50.7           19.3                9.8 +/-    1.30      21.9 +/-    1.30  0.050 / 0.110
G19     223.1          39.4               15.0 +/-    1.31      22.1 +/-    1.31  0.060 / 0.140
G28     17.3           59.5               12.0 +/-    0.38      13.6 +/-    0.38  0.030 / 0.060
G30     133.7          62.0               13.9 +/-    0.96      15.6 +/-    0.96  0.040 / 0.050