PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/09-04:27:20
G02     50.6           39.8                3.0 +/-    1.18       4.4 +/-    1.18  0.050 / 0.050
G05     82.7           67.8                4.3 +/-    0.48       4.6 +/-    0.48  0.030 / 0.060
G12     188.4          46.9                6.1 +/-    1.14       8.1 +/-    1.14  0.030 / 0.030
G20     210.5          23.2                5.3 +/-    2.16      10.9 +/-    2.16  0.020 / 0.030
G25     261.7          57.7                5.9 +/-    0.51       6.8 +/-    0.51  0.040 / 0.050
G29     320.1          43.0                5.5 +/-    0.69       7.6 +/-    0.69  0.040 / 0.040