PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/21-17:13:00
G10     256.4          30.6               17.8 +/-    1.20      30.8 +/-    1.20  0.360 / 0.320
G13     48.8           27.0               13.6 +/-    1.93      25.3 +/-    1.93  0.130 / 0.160
G15     72.3           54.3               16.3 +/-    0.64      19.5 +/-    0.64  0.060 / 0.030
G16     294.6          13.0               13.2 +/-    0.91      34.4 +/-    0.91  0.050 / 0.030
G18     282.2          61.0               15.5 +/-    1.20      17.5 +/-    1.20  0.070 / 0.060
G20     46.1           44.7               14.7 +/-    0.86      20.0 +/-    0.86  0.060 / 0.060
G21     351.5          67.5               15.6 +/-    0.47      16.7 +/-    0.47  0.190 / 0.280
G26     265.1          12.6               16.6 +/-    1.81      43.6 +/-    1.81  0.160 / 0.280
G27     321.6          11.7                3.5 +/-   28.54       9.3 +/-   28.54  0.090 / 0.280
G29     163.9          37.1               17.4 +/-    1.47      26.6 +/-    1.47  0.110 / 0.340