PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-17:13:10
G02     32.0           56.7               10.9 +/-    0.49      12.7 +/-    0.49  0.030 / 0.040
G05     148.9          59.7               13.9 +/-    0.81      15.8 +/-    0.81  0.020 / 0.030
G06     53.3           17.5                8.1 +/-    0.42      19.0 +/-    0.42  0.040 / 0.060
G12     201.7          68.7               11.5 +/-    0.87      12.2 +/-    0.87  0.040 / 0.060
G20     198.2          25.9               12.5 +/-    1.91      24.0 +/-    1.91  0.070 / 0.260
G25     294.9          55.5               11.1 +/-    0.94      13.1 +/-    0.94  0.080 / 0.220
G29     308.9          31.1                9.3 +/-    0.76      16.0 +/-    0.76  0.030 / 0.050