PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/30-19:57:50
G01     286.5          40.8                4.6 +/-    1.09       6.6 +/-    1.09  0.050 / 0.070
G03     313.1          20.3                9.6 +/-    2.00      21.0 +/-    2.00  0.060 / 0.090
G10     122.2          26.6               12.2 +/-    2.31      23.0 +/-    2.31  0.060 / 0.090
G11     262.8          25.1               12.3 +/-    4.33      24.0 +/-    4.33  0.070 / 0.100
G14     28.7           56.9                9.6 +/-    1.28      11.2 +/-    1.28  0.060 / 0.140
G22     314.2          41.1               10.7 +/-    1.08      15.3 +/-    1.08  0.070 / 0.150
G25     63.4           18.8               10.0 +/-    0.98      22.7 +/-    0.98  0.020 / 0.020
G26     155.7          15.3               13.4 +/-    1.51      33.2 +/-    1.51  0.020 / 0.030
G31     115.7          80.5               12.2 +/-    0.66      12.4 +/-    0.66  0.060 / 0.050
G32     53.8           40.2                9.1 +/-    1.49      13.1 +/-    1.49  0.050 / 0.050