PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-12:28:10
G10     302.0          53.0                3.8 +/-    1.06       4.7 +/-    1.06  0.060 / 0.090
G14     211.5          13.5                2.8 +/-    2.19       7.3 +/-    2.19  0.070 / 0.080
G15     45.5           23.7                1.2 +/-    1.48       2.4 +/-    1.48  0.110 / 0.290
G20     71.8           20.8                3.0 +/-    1.95       6.4 +/-    1.95  0.090 / 0.250
G21     109.0          69.8                4.6 +/-    1.07       4.8 +/-    1.07  0.030 / 0.050
G24     94.6           27.8                4.2 +/-    1.47       7.7 +/-    1.47  0.040 / 0.050
G27     295.5          36.1                5.3 +/-    1.70       8.2 +/-    1.70  0.090 / 0.530
G32     212.2          36.1                7.3 +/-    1.53      11.3 +/-    1.53  0.100 / 0.550