PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/20-23:13:00
G01     320.1          14.3                8.8 +/-    2.22      22.3 +/-    2.22  0.150 / 0.360
G08     260.2          15.3               12.2 +/-    1.21      30.2 +/-    1.21  0.180 / 0.340
G10     71.6           56.3               14.6 +/-    6.36      17.2 +/-    6.36  0.110 / 0.370
G11     306.3          21.7                8.3 +/-    2.47      17.5 +/-    2.47  0.160 / 0.400
G14     286.5          70.1               16.1 +/-    6.87      17.1 +/-    6.87  0.040 / 0.030
G18     98.1           31.6               15.4 +/-    5.80      26.1 +/-    5.80  0.020 / 0.030
G27     225.8          11.1               14.7 +/-    4.90      39.9 +/-    4.90  0.050 / 0.080
G31     180.2          33.8               17.4 +/-    5.24      28.2 +/-    5.24  0.050 / 0.090
G32     348.6          71.6               15.6 +/-    6.21      16.4 +/-    6.21  0.040 / 0.050