PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-12:58:10
G08     319.4          11.8                2.6 +/-    4.69       7.0 +/-    4.69  0.060 / 0.090
G10     311.7          55.8                2.2 +/-    1.40       2.6 +/-    1.40  0.060 / 0.070
G14     213.5          19.3                4.0 +/-    2.16       8.9 +/-    2.16  0.030 / 0.050
G15     45.5           18.4                2.9 +/-    0.63       6.6 +/-    0.63  0.030 / 0.050
G20     76.4           16.7                3.2 +/-    1.10       7.5 +/-    1.10  0.120 / 0.310
G21     120.9          64.6                3.4 +/-    0.84       3.8 +/-    0.84  0.100 / 0.420
G24     87.6           29.5                4.0 +/-    1.40       7.1 +/-    1.40  0.120 / 0.520
G27     287.9          37.6                4.0 +/-    0.94       6.1 +/-    0.94  0.150 / 0.490
G32     215.5          42.2                5.6 +/-    2.00       7.9 +/-    2.00  0.100 / 0.270