PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/31-07:57:30
G10     273.7          42.7                5.6 +/-    1.41       7.8 +/-    1.41  0.030 / 0.030
G13     39.4           13.2                3.6 +/-    1.86       9.4 +/-    1.86  0.030 / 0.040
G15     53.3           43.2                4.6 +/-    0.93       6.3 +/-    0.93  0.080 / 0.050
G20     309.9          62.7                5.3 +/-    0.48       5.8 +/-    0.48  0.060 / 0.060
G21     30.6           75.1                6.9 +/-    0.71       7.1 +/-    0.71  0.190 / 0.430
G24     114.2          17.6                5.8 +/-    2.08      13.5 +/-    2.08  0.090 / 0.150
G27     316.8          21.6                4.1 +/-    2.88       8.6 +/-    2.88  0.270 / 0.260
G29     165.5          20.6                5.5 +/-    2.10      11.9 +/-    2.10  0.140 / 0.130