PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/22-11:28:00
G02     200.1          20.6                8.1 +/-    2.15      17.4 +/-    2.15  0.050 / 0.110
G06     173.9          51.6               11.5 +/-    0.79      14.2 +/-    0.79  0.050 / 0.090
G13     229.0          13.5                8.1 +/-    5.41      20.8 +/-    5.41  0.030 / 0.030
G17     24.5           58.4                6.8 +/-    0.47       7.8 +/-    0.47  0.030 / 0.030
G19     328.3          71.3                7.1 +/-    0.80       7.5 +/-    0.80  0.060 / 0.140
G24     311.3          28.0                4.4 +/-    1.37       8.1 +/-    1.37  0.080 / 0.110
G28     88.3           39.4                8.0 +/-    0.42      11.7 +/-    0.42  0.030 / 0.040
G30     157.1          15.2                6.6 +/-    0.93      16.4 +/-    0.93  0.040 / 0.050