PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/27-21:13:10
G02     54.1           37.9                7.8 +/-    0.59      11.8 +/-    0.59  0.040 / 0.040
G05     68.0           65.5                8.4 +/-    0.50       9.2 +/-    0.50  0.030 / 0.030
G12     183.0          35.8               10.0 +/-    1.53      15.6 +/-    1.53  0.040 / 0.100
G13     132.2          11.5                2.6 +/-   29.85       6.9 +/-   29.85  0.040 / 0.110
G21     266.6          13.0               10.9 +/-    3.90      28.6 +/-    3.90  0.050 / 0.090
G25     244.9          55.3                8.6 +/-    0.62      10.2 +/-    0.62  0.050 / 0.070
G29     323.9          48.1                8.3 +/-    1.06      10.8 +/-    1.06  0.040 / 0.060