PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/04-16:57:40
G10     274.2          41.6                9.8 +/-    1.29      13.9 +/-    1.29  0.110 / 0.120
G13     39.7           14.2                7.9 +/-    3.59      20.1 +/-    3.59  0.220 / 0.130
G15     52.6           42.2                9.8 +/-    0.87      13.8 +/-    0.87  0.060 / 0.100
G18     320.4          66.8                9.0 +/-    0.65       9.7 +/-    0.65  0.050 / 0.110
G20     58.1           31.9                7.9 +/-    1.32      13.3 +/-    1.32  0.090 / 0.150
G21     44.0           75.3               10.5 +/-    0.61      10.8 +/-    0.61  0.110 / 0.180
G24     115.8          17.9               12.6 +/-    2.25      29.3 +/-    2.25  0.110 / 0.300
G27     314.2          25.0                6.9 +/-    1.65      13.5 +/-    1.65  0.150 / 0.330
G29     166.5          20.0               14.3 +/-    2.73      31.5 +/-    2.73  0.040 / 0.030
G32     205.9          14.3               13.9 +/-    3.08      35.1 +/-    3.08  0.040 / 0.030