PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-18:27:40
G02     58.3           34.0               11.8 +/-    1.07      19.1 +/-    1.07  0.120 / 0.360
G05     65.1           66.4               12.7 +/-    0.41      13.7 +/-    0.41  0.120 / 0.360
G12     185.8          34.2               14.6 +/-    2.31      23.5 +/-    2.31  0.050 / 0.110
G13     130.9          14.1               14.3 +/-    2.11      36.2 +/-    2.11  0.050 / 0.100
G15     164.6          10.8                3.8 +/-   36.27      10.4 +/-   36.27  0.040 / 0.080
G20     206.8          58.9               16.0 +/-    1.24      18.3 +/-    1.24  0.040 / 0.060
G21     270.5          17.8               12.2 +/-    2.06      28.3 +/-    2.06  0.030 / 0.040
G25     233.8          52.2               14.6 +/-    0.86      17.9 +/-    0.86  0.030 / 0.040
G29     330.9          57.3               11.2 +/-    0.77      13.1 +/-    0.77  0.130 / 0.570