PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/07-14:57:40
G02     51.5           39.2                9.5 +/-    1.98      14.0 +/-    1.98  0.020 / 0.020
G05     86.0           69.7               12.7 +/-    0.70      13.4 +/-    0.70  0.030 / 0.020
G12     188.9          45.5               16.3 +/-    1.05      21.9 +/-    1.05  0.220 / 0.280
G20     203.6          46.8               14.6 +/-    0.84      19.2 +/-    0.84  0.140 / 0.350
G21     263.6          13.5                9.9 +/-    8.76      25.6 +/-    8.76  0.060 / 0.060
G25     254.0          57.7               12.3 +/-    1.56      14.3 +/-    1.56  0.050 / 0.060
G29     325.5          50.2                9.0 +/-    1.01      11.4 +/-    1.01  0.040 / 0.050