PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-14:27:50
G05     48.3           18.6                3.6 +/-    0.65       8.2 +/-    0.65  0.080 / 0.110
G10     235.1          10.3              -15.2 +/-   24.77     -42.2 +/-   24.77  0.070 / 0.130
G13     79.5           37.2                5.1 +/-    0.72       7.7 +/-    0.72  0.040 / 0.060
G15     124.4          51.2                6.9 +/-    0.89       8.6 +/-    0.89  0.040 / 0.080
G18     244.5          42.7                7.2 +/-    1.09      10.1 +/-    1.09  0.170 / 0.270
G20     20.7           70.8                3.7 +/-    0.56       3.9 +/-    0.56  0.120 / 0.210
G21     316.2          50.4                3.4 +/-    0.67       4.3 +/-    0.67  0.110 / 0.350
G25     200.3          12.0                5.1 +/-    1.78      13.6 +/-    1.78  0.110 / 0.350
G26     291.7          19.7                5.9 +/-    3.07      13.1 +/-    3.07  0.050 / 0.040
G29     151.4          69.9                4.9 +/-    0.75       5.2 +/-    0.75  0.050 / 0.050