PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-21:58:00
G10     288.5          48.1               13.3 +/-    3.75      17.2 +/-    3.75  0.140 / 0.140
G15     47.4           33.4                9.5 +/-    1.15      15.6 +/-    1.15  0.160 / 0.130
G18     345.1          66.8               12.7 +/-    0.53      13.7 +/-    0.53  0.040 / 0.040
G20     67.4           21.7               10.1 +/-    2.07      21.4 +/-    2.07  0.040 / 0.030
G21     80.0           75.5               13.1 +/-    0.61      13.4 +/-    0.61  0.110 / 0.140
G24     105.0          24.0               12.2 +/-    1.06      24.5 +/-    1.06  0.070 / 0.130
G27     304.7          32.5               14.0 +/-    2.54      23.2 +/-    2.54  0.050 / 0.100
G32     209.4          23.5               17.7 +/-    1.54      35.9 +/-    1.54  0.050 / 0.090