PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/11-12:27:30
G07     44.1           68.5                4.3 +/-    0.38       4.5 +/-    0.38  0.030 / 0.040
G08     54.2           41.9                0.2 +/-   10.52       0.2 +/-   10.52  0.030 / 0.030
G11     121.1          31.0                6.1 +/-    9.29      10.4 +/-    9.29  0.120 / 0.320
G17     198.7          11.8                1.1 +/-   13.02       2.9 +/-   13.02  0.120 / 0.340
G23     161.0          14.4                4.4 +/-    2.29      11.2 +/-    2.29  0.040 / 0.050
G27     38.0           10.7                2.8 +/-   10.30       7.8 +/-   10.30  0.030 / 0.050
G28     268.4          49.8               -6.2 +/-   40.04      -7.8 +/-   40.04  0.200 / 0.280
G30     324.8          53.9                4.5 +/-    0.84       5.5 +/-    0.84  0.120 / 0.260