PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-16:27:40
G05     50.2           14.5                7.8 +/-    2.56      19.7 +/-    2.56  0.090 / 0.180
G10     239.0          14.8               13.0 +/-    1.72      32.6 +/-    1.72  0.070 / 0.180
G13     71.7           36.8                8.3 +/-    0.76      12.7 +/-    0.76  0.040 / 0.060
G15     115.0          54.5               11.1 +/-    0.69      13.3 +/-    0.69  0.040 / 0.050
G16     315.2          10.7                1.3 +/-   18.30       3.7 +/-   18.30  0.100 / 0.250
G18     250.5          46.9               11.2 +/-    0.84      14.7 +/-    0.84  0.140 / 0.220
G20     29.1           64.1                9.6 +/-    0.47      10.5 +/-    0.47  0.030 / 0.050
G21     321.1          53.1                8.8 +/-    1.15      10.8 +/-    1.15  0.030 / 0.050
G26     286.6          19.0                9.7 +/-    1.79      21.9 +/-    1.79  0.170 / 0.670
G29     155.4          61.5               11.5 +/-    0.86      12.9 +/-    0.86  0.240 / 0.710