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               11.0 +/-    2.22      24.3 +/-    2.22  0.030 / 0.040
G06     171.8          53.7               10.9 +/-    1.18      13.2 +/-    1.18  0.030 / 0.040
G13     228.9          13.1               10.3 +/-    2.31      26.9 +/-    2.31  0.120 / 0.200
G17     25.8           57.5                7.5 +/-    0.34       8.7 +/-    0.34  0.180 / 0.230
G19     331.4          71.1                7.9 +/-    0.61       8.3 +/-    0.61  0.050 / 0.050
G24     311.0          28.4                6.7 +/-    1.06      12.1 +/-    1.06  0.040 / 0.050
G28     88.9           39.1                9.1 +/-    0.46      13.5 +/-    0.46  0.110 / 0.150
G30     157.5          15.6               10.4 +/-    1.49      25.6 +/-    1.49  0.080 / 0.150