PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-01:27:50
G02     47.1           42.7                9.4 +/-    0.98      13.1 +/-    0.98  0.040 / 0.050
G05     92.9           68.8                9.8 +/-    0.66      10.4 +/-    0.66  0.030 / 0.040
G12     190.9          52.3               13.2 +/-    0.70      16.2 +/-    0.70  0.030 / 0.050
G25     265.7          58.7                8.4 +/-    1.33       9.6 +/-    1.33  0.030 / 0.050
G29     320.4          43.6                9.6 +/-    0.66      13.2 +/-    0.66  0.030 / 0.030