PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/18-22:12:30
G08     291.3          23.3               11.6 +/-    0.98      23.6 +/-    0.98  0.140 / 0.130
G10     7.1            63.2               10.7 +/-    0.93      11.8 +/-    0.93  0.120 / 0.150
G14     231.0          48.4               12.8 +/-    1.28      16.5 +/-    1.28  0.040 / 0.110
G18     65.0           50.4               12.2 +/-    0.68      15.3 +/-    0.68  0.040 / 0.140
G21     146.0          36.9               13.1 +/-    0.73      20.1 +/-    0.73  0.050 / 0.120
G24     56.6           26.3               11.3 +/-    0.95      21.4 +/-    0.95  0.060 / 0.120
G27     251.9          31.0               13.6 +/-    1.15      23.3 +/-    1.15  0.060 / 0.070
G32     245.5          65.3               11.5 +/-    1.39      12.5 +/-    1.39  0.060 / 0.080