PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-11:58:00
G01     239.5          28.3                7.7 +/-    1.31      13.9 +/-    1.31  0.050 / 0.080
G03     310.6          56.3                3.9 +/-    1.47       4.6 +/-    1.47  0.060 / 0.060
G14     68.7           38.0                4.0 +/-    2.74       6.1 +/-    2.74  0.090 / 0.110
G16     155.8          30.1                5.8 +/-    1.57      10.0 +/-    1.57  0.080 / 0.180
G18     213.8          18.9                7.5 +/-    2.33      17.0 +/-    2.33  0.030 / 0.030
G22     262.5          77.4                5.2 +/-    0.80       5.3 +/-    0.80  0.030 / 0.030
G23     297.4          30.3                6.3 +/-    1.49      10.9 +/-    1.49  0.100 / 0.130
G26     120.6          47.2                6.4 +/-    0.79       8.4 +/-    0.79  0.090 / 0.120
G31     41.4           44.7                4.6 +/-    1.30       6.2 +/-    1.30  0.090 / 0.040
G32     87.5           14.4                3.6 +/-    2.09       9.1 +/-    2.09  0.080 / 0.050