PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/24-22:13:10
G02     49.2           42.7                9.3 +/-    1.21      13.0 +/-    1.21  0.040 / 0.070
G05     86.2           70.2               12.2 +/-    0.97      12.9 +/-    0.97  0.050 / 0.070
G12     186.1          42.0               11.4 +/-    0.93      16.1 +/-    0.93  0.060 / 0.060
G20     202.3          50.7              -74.7 +/-   48.45     -93.5 +/-   48.45  0.060 / 0.040
G21     263.1          11.0               -3.3 +/-   18.85      -9.0 +/-   18.85  0.140 / 0.250
G25     244.9          57.5               10.9 +/-    1.42      12.6 +/-    1.42  0.070 / 0.070
G29     322.8          47.0                8.6 +/-    0.81      11.3 +/-    0.81  0.060 / 0.070