PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-18:42:50
G02     220.4          62.8               10.9 +/-    1.31      12.1 +/-    1.31  0.070 / 0.070
G06     48.6           68.6                9.6 +/-    0.41      10.2 +/-    0.41  0.110 / 0.090
G12     320.8          43.3                8.0 +/-    0.77      11.1 +/-    0.77  0.030 / 0.030
G17     61.0           29.7               10.6 +/-    2.13      18.8 +/-    2.13  0.040 / 0.030
G19     41.3           48.6               10.1 +/-    1.17      12.9 +/-    1.17  0.040 / 0.060
G24     258.0          40.5               10.7 +/-    4.20      15.4 +/-    4.20  0.030 / 0.060
G28     125.4          10.4               12.9 +/-    2.37      35.8 +/-    2.37  0.060 / 0.060