PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-15:27:50
G02     234.2          72.9                8.4 +/-    0.46       8.7 +/-    0.46  0.390 / 0.340
G05     175.7          11.5                3.9 +/-   21.60      10.4 +/-   21.60  0.120 / 0.230
G06     41.5           62.1                7.3 +/-    0.43       8.2 +/-    0.43  0.110 / 0.150
G12     321.5          49.3                8.3 +/-    0.65      10.6 +/-    0.65  0.130 / 0.120
G17     70.7           21.5                7.9 +/-    0.94      16.7 +/-    0.94  0.040 / 0.040
G19     56.7           38.4                7.9 +/-    1.02      11.7 +/-    1.02  0.030 / 0.040
G24     249.8          36.3                9.3 +/-    2.03      14.3 +/-    2.03  0.160 / 0.300
G25     316.5          13.0                5.1 +/-   17.81      13.4 +/-   17.81  0.190 / 0.280