PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-13:43:10
G10     300.0          52.4                3.4 +/-    1.24       4.2 +/-    1.24  0.080 / 0.080
G14     211.1          12.9                1.3 +/-    5.71       3.3 +/-    5.71  0.070 / 0.050
G15     45.6           24.8                3.5 +/-    2.05       6.9 +/-    2.05  0.100 / 0.430
G20     71.2           20.8                5.4 +/-    1.83      11.6 +/-    1.83  0.100 / 0.320
G21     107.1          69.8                4.1 +/-    0.67       4.3 +/-    0.67  0.080 / 0.180
G24     96.1           27.4                4.4 +/-    1.73       8.2 +/-    1.73  0.160 / 0.180
G27     296.8          35.7                3.8 +/-    2.07       5.9 +/-    2.07  0.070 / 0.120
G32     211.7          34.5                5.3 +/-    2.02       8.5 +/-    2.02  0.090 / 0.100