PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/15-09:42:40
G05     52.1           9.6                 2.0 +/-    2.48       5.5 +/-    2.48  0.070 / 0.110
G10     241.9          19.7                3.5 +/-    4.23       7.8 +/-    4.23  0.080 / 0.140
G13     64.6           34.1                5.1 +/-    1.54       8.3 +/-    1.54  0.050 / 0.050
G15     108.0          56.6                6.8 +/-    0.43       7.9 +/-    0.43  0.050 / 0.050
G16     310.3          12.6                3.7 +/-    2.53       9.7 +/-    2.53  0.030 / 0.030
G20     256.9          43.6                6.4 +/-    2.72       8.8 +/-    2.72  0.030 / 0.030
G21     327.8          56.4                5.6 +/-    0.52       6.5 +/-    0.52  0.220 / 0.500
G29     157.1          58.2                7.1 +/-    0.45       8.3 +/-    0.45  0.230 / 0.380