PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/30-14:57:50
G02     39.5           50.2                9.3 +/-    0.66      11.7 +/-    0.66  0.030 / 0.040
G05     132.2          66.3               11.5 +/-    0.81      12.4 +/-    0.81  0.030 / 0.050
G06     56.6           13.8                6.8 +/-    2.15      17.3 +/-    2.15  0.030 / 0.040
G12     195.8          61.7               11.8 +/-    1.31      13.2 +/-    1.31  0.030 / 0.050
G20     199.7          31.8               12.1 +/-    0.81      20.4 +/-    0.81  0.070 / 0.140
G25     284.5          57.7               11.2 +/-    1.13      13.0 +/-    1.13  0.050 / 0.140
G29     315.0          38.1                9.4 +/-    1.47      14.1 +/-    1.47  0.030 / 0.060