PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/12-20:13:00
G10     296.3          51.6               11.9 +/-    1.81      14.7 +/-    1.81  0.060 / 0.090
G15     46.9           32.8                9.5 +/-    1.52      15.7 +/-    1.52  0.050 / 0.090
G20     350.2          65.4               12.2 +/-    0.32      13.3 +/-    0.32  0.040 / 0.030
G21     94.5           74.1               13.2 +/-    0.61      13.6 +/-    0.61  0.040 / 0.030
G24     95.2           25.8               12.7 +/-    0.91      24.4 +/-    0.91  0.100 / 0.080
G27     302.8          32.9               11.6 +/-    1.98      19.1 +/-    1.98  0.080 / 0.110
G32     210.0          31.7               12.9 +/-    0.59      21.8 +/-    0.59  0.090 / 0.140