PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-18:28:00
G08     284.9          22.5               10.2 +/-    1.26      21.1 +/-    1.26  0.120 / 0.120
G10     24.3           63.0                6.8 +/-    1.34       7.5 +/-    1.34  0.110 / 0.130
G14     238.7          53.7                8.4 +/-    0.77      10.1 +/-    0.77  0.060 / 0.160
G18     75.1           45.2                7.6 +/-    0.68      10.2 +/-    0.68  0.050 / 0.130
G21     148.6          26.5               10.7 +/-    1.54      20.1 +/-    1.54  0.080 / 0.140
G24     50.1           22.4                5.8 +/-    0.53      12.1 +/-    0.53  0.080 / 0.140
G27     244.7          26.7               12.2 +/-    2.59      22.9 +/-    2.59  0.030 / 0.030
G31     183.1          12.3                9.8 +/-    3.47      25.8 +/-    3.47  0.020 / 0.030
G32     266.3          72.7                7.4 +/-    0.76       7.7 +/-    0.76  0.120 / 0.260