PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-05:57:40
G10     252.4          29.3                5.1 +/-    1.78       9.1 +/-    1.78  0.040 / 0.050
G13     51.4           27.9                3.2 +/-    3.06       5.9 +/-    3.06  0.040 / 0.040
G15     80.2           56.2                6.7 +/-    1.01       7.9 +/-    1.01  0.100 / 0.190
G16     297.8          14.2                2.3 +/-    1.44       5.9 +/-    1.44  0.100 / 0.250
G20     273.1          52.3                5.2 +/-    3.53       6.4 +/-    3.53  0.080 / 0.250
G21     340.0          62.8                4.3 +/-    0.73       4.8 +/-    0.73  0.080 / 0.240
G26     269.1          14.5                4.3 +/-    1.18      10.7 +/-    1.18  0.080 / 0.110
G29     162.1          43.3                6.1 +/-    1.27       8.4 +/-    1.27  0.070 / 0.100