PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-01:58:00
G02     54.8           36.4                9.4 +/-    1.03      14.6 +/-    1.03  0.220 / 0.310
G05     68.1           64.8                9.5 +/-    0.54      10.4 +/-    0.54  0.240 / 0.300
G12     185.7          39.3               12.5 +/-    0.68      18.3 +/-    0.68  0.040 / 0.070
G13     133.3          10.8                8.1 +/-   19.01      22.3 +/-   19.01  0.040 / 0.050
G21     265.9          12.8               12.3 +/-    4.87      32.1 +/-    4.87  0.200 / 0.550
G25     249.0          55.7               10.4 +/-    1.75      12.3 +/-    1.75  0.180 / 0.530
G29     323.5          47.7                9.7 +/-    0.66      12.6 +/-    0.66  0.030 / 0.030