PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-16:12:30
G02     238.1          74.0               10.0 +/-    0.43      10.3 +/-    0.43  0.110 / 0.280
G05     175.5          12.7               10.1 +/-    2.64      26.6 +/-    2.64  0.110 / 0.360
G06     40.9           59.8                9.0 +/-    0.74      10.3 +/-    0.74  0.030 / 0.040
G12     321.6          51.4                9.4 +/-    0.43      11.7 +/-    0.43  0.030 / 0.040
G17     72.3           20.3                8.2 +/-    1.34      17.9 +/-    1.34  0.080 / 0.170
G19     58.6           37.2                8.0 +/-    0.79      12.1 +/-    0.79  0.100 / 0.180
G24     247.8          35.4               10.8 +/-    2.42      17.0 +/-    2.42  0.260 / 0.300
G25     316.8          15.0                5.2 +/-    2.57      12.8 +/-    2.57  0.280 / 0.310