PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-01:42:50
G10     257.5          31.1               12.8 +/-    1.91      22.0 +/-    1.91  0.090 / 0.340
G13     48.0           26.4               10.7 +/-    1.62      20.3 +/-    1.62  0.110 / 0.360
G15     75.9           56.8               12.2 +/-    2.87      14.3 +/-    2.87  0.050 / 0.030
G16     289.2          13.9                9.3 +/-    1.10      23.8 +/-    1.10  0.060 / 0.030
G18     279.9          59.1                0.4 +/-   38.03       0.4 +/-   38.03  0.270 / 0.410
G20     49.0           40.5               11.0 +/-    2.51      15.9 +/-    2.51  0.360 / 0.370
G21     343.7          65.6               10.9 +/-    0.87      11.8 +/-    0.87  0.090 / 0.120
G26     262.0          12.2                9.2 +/-   26.81      24.5 +/-   26.81  0.070 / 0.110
G27     321.2          12.9                8.0 +/-    6.54      20.9 +/-    6.54  0.150 / 0.300
G29     166.1          39.4               12.7 +/-    3.00      18.6 +/-    3.00  0.160 / 0.220