PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/29-16:57:40
G02     35.8           53.5               18.4 +/-    0.39      22.3 +/-    0.39  0.030 / 0.060
G05     142.4          63.4               19.8 +/-    0.88      21.9 +/-    0.88  0.040 / 0.060
G06     55.3           14.8               12.6 +/-    0.76      31.5 +/-    0.76  0.030 / 0.050
G12     197.4          64.7               14.2 +/-    1.67      15.5 +/-    1.67  0.040 / 0.040
G20     198.8          29.5               15.6 +/-    2.71      27.6 +/-    2.71  0.140 / 0.220
G25     288.6          57.3               14.3 +/-    0.74      16.7 +/-    0.74  0.110 / 0.180
G29     311.8          34.2               13.7 +/-    1.70      22.1 +/-    1.70  0.070 / 0.180