PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-18:43:00
G08     279.7          21.7                9.9 +/-    1.98      20.8 +/-    1.98  0.130 / 0.130
G10     35.2           62.4                9.1 +/-    0.97      10.1 +/-    0.97  0.060 / 0.170
G14     245.1          57.8               12.2 +/-    1.14      14.1 +/-    1.14  0.090 / 0.140
G18     80.5           42.3                9.2 +/-    1.38      12.9 +/-    1.38  0.180 / 0.150
G21     150.2          21.8               10.4 +/-    2.22      21.9 +/-    2.22  0.030 / 0.050
G24     46.6           19.4                7.1 +/-    2.18      15.8 +/-    2.18  0.050 / 0.040
G27     240.3          23.6               11.7 +/-    1.61      23.6 +/-    1.61  0.020 / 0.020
G31     182.0          16.9               10.4 +/-    1.93      24.7 +/-    1.93  0.030 / 0.020
G32     284.2          74.9                9.9 +/-    0.41      10.2 +/-    0.41  0.020 / 0.020