PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-21:42:50
G02     215.0          59.1               20.8 +/-    0.47      23.8 +/-    0.47  0.070 / 0.080
G06     59.7           74.5               17.2 +/-    0.66      17.8 +/-    0.66  0.050 / 0.080
G12     318.5          36.1               15.5 +/-    1.10      24.1 +/-    1.10  0.050 / 0.090
G17     54.9           35.1               14.2 +/-    0.56      22.4 +/-    0.56  0.060 / 0.090
G19     35.7           51.4               14.6 +/-    0.58      18.1 +/-    0.58  0.130 / 0.310
G24     266.5          41.9               18.4 +/-    1.48      26.0 +/-    1.48  0.130 / 0.380
G28     121.9          14.4               17.6 +/-    1.44      44.5 +/-    1.44  0.050 / 0.080