PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/30-18:27:30
G02     256.2          77.7                8.7 +/-    0.52       8.8 +/-    0.52  0.060 / 0.210
G05     170.0          20.6               10.6 +/-    1.50      23.0 +/-    1.50  0.060 / 0.180
G06     40.3           51.1                7.0 +/-    0.47       8.7 +/-    0.47  0.030 / 0.040
G12     322.0          61.5                8.0 +/-    1.08       9.0 +/-    1.08  0.030 / 0.040
G17     75.5           18.7                8.3 +/-    0.91      18.9 +/-    0.91  0.110 / 0.250
G19     60.0           38.0                7.8 +/-    0.96      11.8 +/-    0.96  0.100 / 0.170
G24     238.3          31.4               12.8 +/-    0.99      21.8 +/-    0.99  0.030 / 0.040
G25     317.4          17.3                9.3 +/-    1.72      21.8 +/-    1.72  0.030 / 0.040