PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-12:43:10
G08     319.1          12.1                1.4 +/-    5.67       3.8 +/-    5.67  0.050 / 0.090
G10     312.7          56.0                3.2 +/-    2.07       3.7 +/-    2.07  0.050 / 0.060
G14     213.8          19.7                2.1 +/-    2.97       4.7 +/-    2.97  0.100 / 0.220
G15     45.5           17.9                3.0 +/-    2.34       6.9 +/-    2.34  0.090 / 0.220
G20     76.8           16.5                2.6 +/-    2.39       6.2 +/-    2.39  0.030 / 0.030
G21     121.8          64.3                6.1 +/-    0.63       6.7 +/-    0.63  0.040 / 0.030
G24     86.8           29.6                5.1 +/-    1.26       9.1 +/-    1.26  0.410 / 0.530
G27     287.1          37.7                4.0 +/-    1.74       6.1 +/-    1.74  0.220 / 0.430
G32     215.8          42.9                5.0 +/-    0.96       7.0 +/-    0.96  0.090 / 0.080