PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/28-17:28:00
G02     256.5          78.1               10.6 +/-    0.68      10.8 +/-    0.68  0.110 / 0.320
G05     173.6          17.7               17.1 +/-    2.09      39.9 +/-    2.09  0.100 / 0.200
G06     40.1           53.1                8.8 +/-    0.49      10.7 +/-    0.49  0.080 / 0.120
G12     321.0          58.2                8.6 +/-    0.70      10.0 +/-    0.70  0.080 / 0.130
G17     77.3           16.5                9.1 +/-    0.77      21.7 +/-    0.77  0.040 / 0.050
G19     64.6           33.3                9.2 +/-    0.62      15.1 +/-    0.62  0.030 / 0.040
G24     241.3          31.8               12.9 +/-    1.59      21.8 +/-    1.59  0.050 / 0.150
G25     317.6          21.1                8.1 +/-    3.27      17.4 +/-    3.27  0.050 / 0.180