PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-21:57:40
G10     288.5          48.1               13.4 +/-    1.20      17.3 +/-    1.20  0.050 / 0.050
G15     47.4           33.4                9.5 +/-    0.45      15.5 +/-    0.45  0.050 / 0.050
G18     345.1          66.8               11.6 +/-    1.46      12.5 +/-    1.46  0.070 / 0.140
G20     67.4           21.7                9.4 +/-    0.61      19.9 +/-    0.61  0.080 / 0.170
G21     80.0           75.5               14.9 +/-    0.80      15.3 +/-    0.80  0.080 / 0.190
G24     105.0          24.0               11.8 +/-    1.49      23.5 +/-    1.49  0.070 / 0.170
G27     304.7          32.5               14.4 +/-    2.04      24.0 +/-    2.04  0.080 / 0.200
G32     209.4          23.5               16.7 +/-    1.07      33.8 +/-    1.07  0.090 / 0.220