PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-13:42:20
G08     296.3          21.7                3.5 +/-    1.96       7.3 +/-    1.96  0.070 / 0.100
G10     5.3            63.0                3.2 +/-    0.53       3.6 +/-    0.53  0.080 / 0.110
G14     229.5          44.4                5.0 +/-    3.19       6.8 +/-    3.19  0.040 / 0.090
G21     145.7          38.6                5.3 +/-    1.34       7.9 +/-    1.34  0.050 / 0.090
G24     57.1           26.3                4.5 +/-    1.33       8.6 +/-    1.33  0.080 / 0.090
G27     253.8          31.7                4.7 +/-    1.81       8.0 +/-    1.81  0.080 / 0.110
G32     246.0          68.1                5.3 +/-    0.70       5.7 +/-    0.70  0.030 / 0.030