PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/14-14:12:30
G02     201.3          23.4                9.9 +/-    2.04      20.0 +/-    2.04  0.030 / 0.040
G06     170.2          57.7                7.8 +/-    0.46       9.0 +/-    0.46  0.040 / 0.040
G13     226.2          10.7                7.5 +/-    1.10      20.6 +/-    1.10  0.130 / 0.400
G17     29.5           54.6                5.7 +/-    1.13       6.9 +/-    1.13  0.140 / 0.350
G19     342.8          69.7                6.1 +/-    0.73       6.5 +/-    0.73  0.190 / 0.220
G24     308.5          31.0                4.9 +/-    0.96       8.5 +/-    0.96  0.160 / 0.270
G28     93.0           36.9                6.6 +/-    0.96      10.1 +/-    0.96  0.080 / 0.100
G30     157.9          12.1                9.4 +/-    1.41      25.1 +/-    1.41  0.050 / 0.100