PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-22:57:50
G02     68.5           27.1                6.7 +/-    0.75      12.5 +/-    0.75  0.110 / 0.260
G05     47.8           52.4                7.2 +/-    0.47       8.8 +/-    0.47  0.090 / 0.210
G12     181.6          18.1               11.6 +/-    2.51      26.8 +/-    2.51  0.080 / 0.100
G13     118.7          24.0               10.8 +/-    1.47      21.5 +/-    1.47  0.070 / 0.100
G15     158.6          21.3               12.0 +/-    1.28      25.5 +/-    1.28  0.030 / 0.030
G18     222.2          11.0               -1.8 +/-   25.52      -4.9 +/-   25.52  0.030 / 0.040
G20     218.1          76.4               10.1 +/-    0.81      10.3 +/-    0.81  0.020 / 0.040
G21     281.6          25.2                9.2 +/-    1.82      17.8 +/-    1.82  0.030 / 0.050
G25     215.6          39.1                9.8 +/-    0.77      14.4 +/-    0.77  0.080 / 0.200
G29     339.4          69.4                8.7 +/-    0.71       9.3 +/-    0.71  0.070 / 0.170