PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-20:12:30
G02     290.0          80.0               10.2 +/-    0.69      10.3 +/-    0.69  0.100 / 0.150
G05     169.1          26.6               11.7 +/-    1.61      22.1 +/-    1.61  0.090 / 0.170
G06     41.0           44.3                7.2 +/-    0.35       9.8 +/-    0.35  0.050 / 0.120
G12     316.8          68.0                8.4 +/-    1.06       9.0 +/-    1.06  0.050 / 0.140
G17     83.8           11.8               11.2 +/-    2.29      30.1 +/-    2.29  0.100 / 0.290
G19     72.2           28.4                9.1 +/-    0.57      16.6 +/-    0.57  0.080 / 0.280
G24     233.9          26.7               11.8 +/-    2.28      22.3 +/-    2.28  0.030 / 0.040
G25     317.5          28.9                8.9 +/-    1.63      15.9 +/-    1.63  0.030 / 0.040