PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-21:57:50
G02     52.5           39.0                9.1 +/-    1.72      13.4 +/-    1.72  0.030 / 0.030
G05     72.6           66.6                9.9 +/-    0.58      10.7 +/-    0.58  0.030 / 0.030
G12     183.8          38.7               12.6 +/-    0.67      18.7 +/-    0.67  0.290 / 0.420
G13     133.9          10.0               -2.0 +/-   27.13      -5.5 +/-   27.13  0.320 / 0.460
G21     264.9          11.7                9.1 +/-   22.06      24.4 +/-   22.06  0.050 / 0.070
G25     249.5          56.4               10.4 +/-    1.94      12.2 +/-    1.94  0.050 / 0.050
G29     322.5          46.1               10.2 +/-    0.53      13.5 +/-    0.53  0.150 / 0.450