PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-14:27:30
G02     200.5          17.2               13.6 +/-    0.85      32.1 +/-    0.85  0.030 / 0.030
G06     172.5          51.1               11.5 +/-    0.47      14.4 +/-    0.47  0.030 / 0.030
G17     23.3           59.5                9.4 +/-    1.00      10.7 +/-    1.00  0.090 / 0.180
G19     323.1          71.8               10.5 +/-    0.37      11.0 +/-    0.37  0.100 / 0.160
G24     312.5          26.6                7.5 +/-    0.88      14.1 +/-    0.88  0.090 / 0.180
G28     86.1           40.5                9.2 +/-    1.30      13.3 +/-    1.30  0.140 / 0.170
G30     157.2          18.0               10.9 +/-    1.82      25.3 +/-    1.82  0.040 / 0.040