PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/30-18:27:40
G02     256.2          77.7                9.4 +/-    0.37       9.6 +/-    0.37  0.150 / 0.190
G05     170.0          20.6               10.7 +/-    1.17      23.1 +/-    1.17  0.150 / 0.200
G06     40.3           51.1                8.6 +/-    0.58      10.7 +/-    0.58  0.110 / 0.160
G12     322.0          61.5                9.0 +/-    0.96      10.1 +/-    0.96  0.150 / 0.110
G17     75.5           18.7                7.9 +/-    1.43      17.9 +/-    1.43  0.020 / 0.030
G19     60.0           38.0                9.1 +/-    1.45      13.7 +/-    1.45  0.030 / 0.030
G24     238.3          31.4               10.8 +/-    1.68      18.4 +/-    1.68  0.190 / 0.330
G25     317.4          17.3                8.5 +/-    2.26      20.0 +/-    2.26  0.370 / 0.210