PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-14:42:40
G01     320.9          11.5               -7.6 +/-   29.82     -20.6 +/-   29.82  0.170 / 0.470
G08     266.9          16.5                7.1 +/-    1.58      17.0 +/-    1.58  0.150 / 0.350
G10     66.7           57.4                6.5 +/-    0.80       7.6 +/-    0.80  0.180 / 0.450
G11     311.2          16.9                5.9 +/-    1.43      13.9 +/-    1.43  0.240 / 0.480
G14     272.3          66.6                8.5 +/-    0.80       9.2 +/-    0.80  0.060 / 0.080
G21     154.4          10.3                9.5 +/-    2.38      26.4 +/-    2.38  0.050 / 0.090
G27     228.5          13.3                5.5 +/-    2.00      14.2 +/-    2.00  0.040 / 0.050
G31     177.2          34.5                8.6 +/-    1.48      13.8 +/-    1.48  0.030 / 0.040
G32     351.9          72.1                6.5 +/-    0.73       6.8 +/-    0.73  0.300 / 0.380