PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/09-14:27:40
G02     201.0          20.8               10.2 +/-    2.95      21.9 +/-    2.95  0.150 / 0.400
G06     171.1          55.1               11.1 +/-    0.68      13.2 +/-    0.68  0.220 / 0.500
G13     228.0          12.3                7.7 +/-    1.51      20.4 +/-    1.51  0.170 / 0.120
G17     27.1           56.5                9.9 +/-    0.89      11.7 +/-    0.89  0.120 / 0.150
G19     335.4          70.7               10.0 +/-    0.43      10.5 +/-    0.43  0.200 / 0.340
G24     310.2          29.3                7.4 +/-    1.66      13.1 +/-    1.66  0.210 / 0.290
G28     90.3           38.4               10.4 +/-    1.42      15.6 +/-    1.42  0.040 / 0.040
G30     157.7          14.5               11.5 +/-    2.62      29.0 +/-    2.62  0.060 / 0.030