PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-01:42:40
G02     49.4           41.0                8.9 +/-    1.32      12.8 +/-    1.32  0.040 / 0.060
G05     84.9           68.2                9.6 +/-    0.60      10.2 +/-    0.60  0.040 / 0.050
G12     187.3          46.6               13.6 +/-    0.67      17.9 +/-    0.67  0.030 / 0.030
G25     262.4          57.9               10.9 +/-    1.02      12.6 +/-    1.02  0.030 / 0.030
G29     319.3          41.8               10.4 +/-    0.95      14.8 +/-    0.95  0.040 / 0.040