PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-13:57:50
G10     298.4          51.9                2.3 +/-    2.17       2.9 +/-    2.17  0.070 / 0.080
G14     210.8          12.0               -2.2 +/-   10.94      -6.0 +/-   10.94  0.090 / 0.100
G15     45.7           25.7                3.5 +/-    1.82       6.8 +/-    1.82  0.090 / 0.420
G20     70.5           21.3                3.9 +/-    1.87       8.3 +/-    1.87  0.130 / 0.400
G21     104.7          70.4                3.5 +/-    0.52       3.7 +/-    0.52  0.030 / 0.040
G24     97.3           27.0                4.1 +/-    1.23       7.6 +/-    1.23  0.030 / 0.030
G27     298.0          35.3                3.1 +/-    1.92       4.9 +/-    1.92  0.070 / 0.190
G32     211.2          33.4                3.8 +/-    1.79       6.3 +/-    1.79  0.090 / 0.170