PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/12-06:43:00
G05     50.8           11.8                1.9 +/-    2.68       5.0 +/-    2.68  0.090 / 0.290
G10     239.1          15.4                5.5 +/-    1.15      13.7 +/-    1.15  0.100 / 0.260
G13     70.6           36.1                6.0 +/-    1.10       9.3 +/-    1.10  0.150 / 0.120
G15     115.2          54.7                6.1 +/-    0.62       7.2 +/-    0.62  0.170 / 0.160
G16     310.1          13.8                2.6 +/-    1.41       6.6 +/-    1.41  0.040 / 0.040
G20     309.2          75.6                5.9 +/-    0.66       6.1 +/-    0.66  0.040 / 0.030
G21     317.6          50.2                5.0 +/-    0.76       6.2 +/-    0.76  0.050 / 0.050
G26     281.8          20.2                3.3 +/-    1.72       7.2 +/-    1.72  0.060 / 0.050
G29     158.8          67.2                7.1 +/-    0.38       7.6 +/-    0.38  0.030 / 0.040