PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-15:12:30
G02     204.9          37.4               14.1 +/-    2.12      21.4 +/-    2.12  0.110 / 0.150
G06     153.8          73.1               12.2 +/-    0.77      12.7 +/-    0.77  0.110 / 0.170
G12     310.1          18.6               10.1 +/-    1.36      23.0 +/-    1.36  0.050 / 0.100
G17     42.4           43.9                9.9 +/-    0.51      13.6 +/-    0.51  0.060 / 0.080
G19     14.4           61.4               11.0 +/-    0.57      12.3 +/-    0.57  0.030 / 0.030
G24     295.0          39.0               11.8 +/-    1.29      17.5 +/-    1.29  0.030 / 0.030
G28     107.0          27.8               10.1 +/-    1.43      18.5 +/-    1.43  0.040 / 0.060