PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-12:57:40
G08     313.3          16.3                5.5 +/-    3.13      13.3 +/-    3.13  0.140 / 0.440
G10     327.1          59.1                4.5 +/-    1.56       5.1 +/-    1.56  0.110 / 0.430
G14     217.3          27.3                4.9 +/-    1.09       9.1 +/-    1.09  0.040 / 0.040
G15     46.5           11.1                2.5 +/-    1.70       6.9 +/-    1.70  0.050 / 0.050
G20     82.8           11.5                3.0 +/-    3.23       8.1 +/-    3.23  0.070 / 0.070
G21     132.1          56.8                5.4 +/-    0.56       6.3 +/-    0.56  0.050 / 0.060
G24     77.2           30.4                4.1 +/-    0.40       7.2 +/-    0.40  0.080 / 0.190
G27     276.4          37.8                7.1 +/-    1.59      10.7 +/-    1.59  0.100 / 0.180
G32     221.6          51.0                7.5 +/-    2.37       9.3 +/-    2.37  0.090 / 0.170