PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-11:57:40
G10     278.0          43.7                4.3 +/-    1.66       5.9 +/-    1.66  0.050 / 0.110
G13     38.6           11.2                4.1 +/-    5.44      11.3 +/-    5.44  0.050 / 0.120
G15     50.5           39.3                5.6 +/-    1.44       8.3 +/-    1.44  0.040 / 0.030
G20     58.7           32.8                4.5 +/-    0.68       7.4 +/-    0.68  0.050 / 0.050
G21     45.3           76.3                6.0 +/-    0.66       6.2 +/-    0.66  0.080 / 0.110
G24     112.5          19.7                6.3 +/-    1.71      13.9 +/-    1.71  0.070 / 0.120
G27     312.4          26.9                6.8 +/-    0.96      12.7 +/-    0.96  0.080 / 0.170
G29     167.9          19.6                4.0 +/-    0.83       8.8 +/-    0.83  0.080 / 0.170
G32     206.0          18.9                3.8 +/-    2.71       8.5 +/-    2.71  0.200 / 0.570