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               20.0 +/-    0.73      23.0 +/-    0.73  0.070 / 0.090
G06     59.7           74.5               16.8 +/-    0.45      17.4 +/-    0.45  0.040 / 0.070
G12     318.5          36.1               15.6 +/-    1.53      24.2 +/-    1.53  0.060 / 0.070
G17     54.9           35.1               15.3 +/-    1.25      24.3 +/-    1.25  0.050 / 0.060
G19     35.7           51.4               15.5 +/-    1.85      19.2 +/-    1.85  0.030 / 0.040
G24     266.5          41.9               17.8 +/-    3.06      25.0 +/-    3.06  0.030 / 0.030
G28     121.9          14.4               17.2 +/-    2.07      43.3 +/-    2.07  0.060 / 0.040