PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-01:42:40
G02     39.1           50.3               10.7 +/-    0.58      13.5 +/-    0.58  0.030 / 0.040
G05     123.2          66.5               13.4 +/-    0.64      14.5 +/-    0.64  0.050 / 0.040
G06     57.2           11.2                7.8 +/-    1.14      21.3 +/-    1.14  0.040 / 0.040
G12     193.1          61.3               14.0 +/-    0.62      15.7 +/-    0.62  0.020 / 0.040
G25     288.5          55.9               11.2 +/-    0.92      13.2 +/-    0.92  0.060 / 0.060
G29     310.9          31.6               10.4 +/-    1.44      17.6 +/-    1.44  0.040 / 0.050