PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-19:42:30
G02     23.3           62.7                8.1 +/-    0.95       9.0 +/-    0.95  0.040 / 0.050
G05     149.5          55.7               10.0 +/-    0.95      11.8 +/-    0.95  0.030 / 0.060
G06     50.7           19.5                7.2 +/-    1.43      16.0 +/-    1.43  0.030 / 0.040
G12     199.4          73.0                9.3 +/-    0.84       9.7 +/-    0.84  0.030 / 0.040
G19     93.1           16.7                8.7 +/-    0.96      20.7 +/-    0.96  0.040 / 0.060
G25     305.4          49.0               10.3 +/-    0.61      13.1 +/-    0.61  0.030 / 0.060
G29     301.7          21.7                9.6 +/-    3.10      20.3 +/-    3.10  0.060 / 0.070