PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/17-13:43:10
G10     267.3          37.9                6.0 +/-    1.14       9.0 +/-    1.14  0.130 / 0.210
G13     42.1           18.8                2.2 +/-    0.94       4.9 +/-    0.94  0.130 / 0.260
G15     57.5           46.9                2.9 +/-    0.35       3.8 +/-    0.35  0.040 / 0.060
G16     281.3          11.4                4.4 +/-    2.57      11.9 +/-    2.57  0.040 / 0.080
G18     307.2          65.9                2.7 +/-    0.65       3.0 +/-    0.65  0.040 / 0.040
G20     52.6           38.3                1.4 +/-    0.46       2.0 +/-    0.46  0.040 / 0.050
G21     16.2           73.4                3.4 +/-    1.24       3.5 +/-    1.24  0.160 / 0.290
G24     120.9          14.3                5.8 +/-    2.01      14.8 +/-    2.01  0.130 / 0.330
G27     317.8          20.2                3.5 +/-    1.42       7.7 +/-    1.42  0.100 / 0.200
G29     166.8          28.1                4.7 +/-    0.82       8.6 +/-    0.82  0.090 / 0.190