PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-21:42:40
G02     200.4          23.5               15.1 +/-    3.86      30.5 +/-    3.86  0.160 / 0.240
G06     168.8          57.0               13.1 +/-    0.71      15.3 +/-    0.71  0.370 / 0.280
G13     225.8          11.6               14.3 +/-    1.95      38.6 +/-    1.95  0.070 / 0.140
G17     19.4           60.7               12.0 +/-    0.77      13.6 +/-    0.77  0.070 / 0.170
G19     325.5          70.4               11.4 +/-    0.41      12.1 +/-    0.41  0.060 / 0.080
G24     308.4          31.3               12.3 +/-    2.09      21.0 +/-    2.09  0.050 / 0.090
G28     90.7           38.2               12.7 +/-    1.74      19.0 +/-    1.74  0.030 / 0.040
G30     157.1          11.8               14.8 +/-    2.52      39.8 +/-    2.52  0.040 / 0.040