PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-17:13:10
G02     58.1           35.1                6.9 +/-    0.76      11.0 +/-    0.76  0.040 / 0.060
G05     60.2           64.0                7.5 +/-    0.57       8.2 +/-    0.57  0.040 / 0.070
G12     182.7          30.1               10.1 +/-    2.12      17.7 +/-    2.12  0.080 / 0.100
G13     127.3          15.6               12.6 +/-    1.36      31.0 +/-    1.36  0.060 / 0.110
G15     167.2          10.5               -6.1 +/-   24.21     -16.8 +/-   24.21  0.180 / 0.360
G21     272.0          17.8                8.9 +/-    2.51      20.6 +/-    2.51  0.130 / 0.270
G25     231.5          51.0                9.5 +/-    0.92      11.8 +/-    0.92  0.140 / 0.260
G29     328.4          54.6                5.2 +/-    1.15       6.2 +/-    1.15  0.080 / 0.220