PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/04-16:57:50
G02     254.9          78.0               15.6 +/-    0.39      15.9 +/-    0.39  0.090 / 0.140
G05     173.8          17.2               19.8 +/-    2.23      46.6 +/-    2.23  0.100 / 0.140
G06     40.0           53.9               13.1 +/-    0.62      15.8 +/-    0.62  0.040 / 0.080
G12     321.1          57.4               11.2 +/-    1.69      13.1 +/-    1.69  0.030 / 0.050
G17     76.8           16.9               12.8 +/-    1.34      30.3 +/-    1.34  0.120 / 0.380
G19     64.0           33.7               12.9 +/-    1.10      21.0 +/-    1.10  0.170 / 0.380
G24     241.9          32.2               15.0 +/-    1.15      25.1 +/-    1.15  0.090 / 0.270
G25     317.6          20.2               11.2 +/-    2.85      24.6 +/-    2.85  0.100 / 0.290