PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-18:42:50
G02     212.7          53.6               13.9 +/-    1.19      16.8 +/-    1.19  0.060 / 0.110
G06     70.7           76.6               10.8 +/-    0.66      11.1 +/-    0.66  0.040 / 0.090
G12     317.8          34.5                9.2 +/-    1.61      14.7 +/-    1.61  0.120 / 0.390
G17     53.1           35.8                9.8 +/-    0.97      15.3 +/-    0.97  0.090 / 0.370
G19     29.6           54.5               10.3 +/-    0.87      12.3 +/-    0.87  0.060 / 0.080
G24     270.8          42.7               11.2 +/-    0.80      15.6 +/-    0.80  0.050 / 0.080
G28     119.1          17.4               13.1 +/-    1.61      30.7 +/-    1.61  0.040 / 0.060