PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/12-18:28:00
G02     246.2          75.4               10.9 +/-    0.58      11.2 +/-    0.58  0.130 / 0.270
G05     173.7          16.2               15.5 +/-    1.83      37.5 +/-    1.83  0.140 / 0.330
G06     40.4           55.0                9.1 +/-    1.05      10.8 +/-    1.05  0.070 / 0.120
G12     321.6          56.2                7.4 +/-    0.82       8.7 +/-    0.82  0.060 / 0.110
G17     75.4           18.0                8.8 +/-    0.67      20.3 +/-    0.67  0.040 / 0.060
G19     62.3           34.8                8.7 +/-    0.77      13.8 +/-    0.77  0.030 / 0.050
G24     243.8          33.3               10.2 +/-    1.61      16.7 +/-    1.61  0.100 / 0.190
G25     317.4          19.6                9.9 +/-    1.85      22.1 +/-    1.85  0.110 / 0.180