PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/22-16:13:00
G02     54.6           36.7                9.0 +/-    0.66      13.8 +/-    0.66  0.020 / 0.040
G05     75.3           68.4               10.7 +/-    0.49      11.4 +/-    0.49  0.020 / 0.040
G12     187.5          40.6               13.2 +/-    1.78      18.9 +/-    1.78  0.050 / 0.070
G13     134.7          10.5                0.2 +/-   30.46       0.7 +/-   30.46  0.040 / 0.080
G20     204.9          52.0               13.0 +/-    1.18      16.1 +/-    1.18  0.200 / 0.340
G21     266.7          15.5                9.5 +/-    0.93      23.5 +/-    0.93  0.190 / 0.330
G25     244.8          55.8               12.8 +/-    0.76      15.2 +/-    0.76  0.060 / 0.060
G29     328.4          53.7                8.6 +/-    0.98      10.4 +/-    0.98  0.080 / 0.070