PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/11-19:27:30
G02     233.9          72.0               11.8 +/-    0.36      12.4 +/-    0.36  0.220 / 0.220
G05     172.7          13.9               15.6 +/-    2.32      39.9 +/-    2.32  0.120 / 0.180
G06     41.7           59.5               12.0 +/-    0.56      13.6 +/-    0.56  0.110 / 0.100
G12     322.3          52.2                9.9 +/-    0.49      12.1 +/-    0.49  0.060 / 0.100
G17     68.5           24.3               11.1 +/-    1.04      22.1 +/-    1.04  0.040 / 0.030
G19     51.9           42.6               10.1 +/-    0.85      14.1 +/-    0.85  0.030 / 0.030
G24     246.9          36.2               12.8 +/-    1.68      19.9 +/-    1.68  0.040 / 0.050