PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/27-22:57:30
G05     46.5           23.4                6.3 +/-    0.53      12.8 +/-    0.53  0.050 / 0.140
G13     85.7           36.0                8.6 +/-    0.66      13.4 +/-    0.66  0.060 / 0.110
G15     138.5          46.0               10.2 +/-    0.82      13.6 +/-    0.82  0.080 / 0.190
G20     238.1          11.5                6.5 +/-    2.18      17.5 +/-    2.18  0.090 / 0.190
G21     305.3          41.2                8.9 +/-    1.06      12.8 +/-    1.06  0.070 / 0.110
G25     203.0          16.9                9.6 +/-    3.08      22.8 +/-    3.08  0.070 / 0.090
G26     293.9          21.0                9.4 +/-    2.38      20.2 +/-    2.38  0.030 / 0.030
G29     144.6          82.6                8.8 +/-    1.09       8.9 +/-    1.09  0.030 / 0.030