PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/22-21:12:50
G10     282.7          46.3                9.3 +/-    1.49      12.3 +/-    1.49  0.070 / 0.140
G15     51.1           42.7                8.7 +/-    0.35      12.1 +/-    0.35  0.070 / 0.120
G20     326.1          64.6                7.5 +/-    0.94       8.2 +/-    0.94  0.040 / 0.050
G21     51.2           77.1                8.2 +/-    0.42       8.4 +/-    0.42  0.040 / 0.050
G24     105.9          21.7               11.8 +/-    0.96      25.0 +/-    0.96  0.090 / 0.210
G27     311.3          27.5                6.6 +/-    0.93      12.1 +/-    0.93  0.090 / 0.180
G29     168.7          18.1               12.3 +/-    1.96      28.4 +/-    1.96  0.030 / 0.060
G32     206.6          22.4               12.5 +/-    0.76      25.9 +/-    0.76  0.040 / 0.060