PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/12-12:43:10
G05     49.4           15.5                2.5 +/-    2.83       6.1 +/-    2.83  0.110 / 0.210
G10     236.9          12.6                3.5 +/-    4.74       9.2 +/-    4.74  0.080 / 0.130
G13     75.5           37.0                4.9 +/-    0.90       7.6 +/-    0.90  0.050 / 0.040
G15     119.6          53.0                7.0 +/-    0.69       8.5 +/-    0.69  0.040 / 0.040
G16     315.6          11.1               -6.3 +/-    0.33     -17.1 +/-    0.33  0.050 / 0.050
G18     247.6          45.4                6.4 +/-    2.41       8.6 +/-    2.41  0.040 / 0.050
G20     22.1           69.1                3.8 +/-    0.42       4.1 +/-    0.42  0.110 / 0.230
G21     317.5          50.8                2.9 +/-    0.87       3.6 +/-    0.87  0.100 / 0.260
G26     287.6          20.0                1.7 +/-    1.04       3.7 +/-    1.04  0.060 / 0.080
G29     154.6          67.9                6.1 +/-    0.53       6.5 +/-    0.53  0.040 / 0.080