PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/27-12:57:30
G02     32.5           55.2                4.5 +/-    0.73       5.3 +/-    0.73  0.020 / 0.040
G05     149.0          59.6                6.8 +/-    0.66       7.8 +/-    0.66  0.030 / 0.040
G06     53.0           15.4                2.6 +/-    1.20       6.3 +/-    1.20  0.090 / 0.050
G12     193.2          67.5                4.2 +/-    0.89       4.5 +/-    0.89  0.050 / 0.040
G25     298.7          52.3                5.0 +/-    1.19       6.2 +/-    1.19  0.050 / 0.050
G29     305.9          26.4                2.8 +/-    1.43       5.3 +/-    1.43  0.040 / 0.050