PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/19-14:43:00
G08     320.5          10.9               -9.3 +/-   27.31     -25.5 +/-   27.31  0.080 / 0.070
G10     306.8          54.4                3.9 +/-    1.04       4.7 +/-    1.04  0.050 / 0.070
G14     212.4          17.3                5.5 +/-    0.76      13.0 +/-    0.76  0.030 / 0.040
G15     45.4           20.9                3.5 +/-    0.86       7.5 +/-    0.86  0.030 / 0.040
G18     18.4           63.5                3.7 +/-    0.77       4.1 +/-    0.77  0.070 / 0.150
G20     74.7           17.4                5.3 +/-    0.87      12.4 +/-    0.87  0.070 / 0.120
G21     116.6          65.8                6.1 +/-    0.88       6.6 +/-    0.88  0.090 / 0.200
G24     91.2           28.8                7.4 +/-    0.63      13.3 +/-    0.63  0.110 / 0.210
G27     291.4          37.1                5.0 +/-    1.43       7.7 +/-    1.43  0.080 / 0.260
G32     213.9          38.7                6.0 +/-    1.90       8.9 +/-    1.90  0.080 / 0.270