PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-20:57:30
G02     52.2           39.8               10.0 +/-    0.52      14.6 +/-    0.52  0.100 / 0.070
G05     80.9           70.1                9.6 +/-    0.49      10.1 +/-    0.49  0.070 / 0.090
G12     186.2          39.8               12.5 +/-    2.79      18.3 +/-    2.79  0.050 / 0.060
G13     135.3          10.1               -6.5 +/-   21.57     -18.0 +/-   21.57  0.040 / 0.050
G20     203.5          53.2               11.3 +/-    0.96      13.7 +/-    0.96  0.230 / 0.460
G21     265.2          13.0               13.8 +/-    1.64      35.9 +/-    1.64  0.150 / 0.430
G25     240.1          56.0               12.4 +/-    0.65      14.6 +/-    0.65  0.050 / 0.060
G29     325.1          50.0               10.5 +/-    0.96      13.3 +/-    0.96  0.050 / 0.070