PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-18:57:50
G02     312.8          80.4                8.9 +/-    0.64       9.0 +/-    0.64  0.050 / 0.110
G05     166.0          29.9               13.3 +/-    1.08      23.3 +/-    1.08  0.040 / 0.090
G06     41.3           41.7                8.7 +/-    0.63      12.3 +/-    0.63  0.030 / 0.030
G12     315.3          71.7                9.7 +/-    0.47      10.2 +/-    0.47  0.030 / 0.040
G17     83.5           13.1               10.9 +/-    1.28      28.3 +/-    1.28  0.070 / 0.140
G19     69.8           32.0               10.7 +/-    0.76      18.0 +/-    0.76  0.070 / 0.150
G24     229.7          24.8               10.2 +/-    3.79      20.0 +/-    3.79  0.030 / 0.040
G25     317.6          26.1                8.8 +/-    2.59      16.8 +/-    2.59  0.030 / 0.030