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                2.0 +/-   10.82       5.3 +/-   10.82  0.040 / 0.050
G10     311.7          55.8                4.3 +/-    2.32       5.1 +/-    2.32  0.040 / 0.060
G14     213.5          19.3                3.3 +/-    2.67       7.5 +/-    2.67  0.130 / 0.170
G15     45.5           18.4                4.1 +/-    2.57       9.4 +/-    2.57  0.080 / 0.230
G20     76.4           16.7                2.5 +/-    2.85       6.0 +/-    2.85  0.330 / 0.370
G21     120.9          64.6                5.0 +/-    0.61       5.5 +/-    0.61  0.260 / 0.450
G24     87.6           29.5                5.9 +/-    1.92      10.5 +/-    1.92  0.030 / 0.030
G27     287.9          37.6                2.4 +/-    1.04       3.6 +/-    1.04  0.030 / 0.030
G32     215.5          42.2                4.6 +/-    1.13       6.5 +/-    1.13  0.150 / 0.280