PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-14:27:40
G02     201.5          24.5               12.7 +/-    2.67      25.0 +/-    2.67  0.110 / 0.090
G06     169.4          59.2               11.4 +/-    0.70      13.0 +/-    0.70  0.100 / 0.120
G17     30.8           53.6               10.1 +/-    0.98      12.2 +/-    0.98  0.240 / 0.410
G19     346.3          69.1               10.6 +/-    0.51      11.3 +/-    0.51  0.240 / 0.500
G24     307.6          31.9                7.9 +/-    1.65      13.4 +/-    1.65  0.040 / 0.040
G28     94.3           36.2               10.3 +/-    1.23      15.9 +/-    1.23  0.040 / 0.040
G30     158.0          11.0               11.4 +/-    2.43      31.2 +/-    2.43  0.040 / 0.040