PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-14:12:30
G02     200.8          19.8               12.0 +/-    2.88      26.6 +/-    2.88  0.140 / 0.450
G06     171.8          53.7               10.5 +/-    0.53      12.7 +/-    0.53  0.110 / 0.310
G13     228.9          13.1                8.4 +/-    2.62      21.8 +/-    2.62  0.120 / 0.250
G17     25.8           57.5                8.7 +/-    1.09      10.1 +/-    1.09  0.180 / 0.320
G19     331.4          71.1                7.7 +/-    0.30       8.1 +/-    0.30  0.040 / 0.030
G24     311.0          28.4                5.0 +/-    1.43       9.1 +/-    1.43  0.030 / 0.030
G28     88.9           39.1                9.3 +/-    1.30      13.7 +/-    1.30  0.040 / 0.040
G30     157.5          15.6               10.6 +/-    2.58      26.1 +/-    2.58  0.050 / 0.040