PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-11:12:50
G03     192.8          22.2                1.9 +/-    4.72       3.9 +/-    4.72  0.030 / 0.040
G07     293.3          40.5                8.8 +/-   13.65      12.7 +/-   13.65  0.030 / 0.040
G08     138.7          29.4                3.5 +/-    3.16       6.2 +/-    3.16  0.110 / 0.400
G09     321.4          65.8                4.6 +/-    5.05       4.9 +/-    5.05  0.210 / 0.400
G16     42.6           39.4                7.0 +/-   12.69      10.3 +/-   12.69  0.050 / 0.080
G23     112.6          80.3                2.9 +/-    0.62       2.9 +/-    0.62  0.050 / 0.070
G26     43.4           12.3              -12.2 +/-   68.02     -32.2 +/-   68.02  0.040 / 0.090
G27     97.1           33.9               -0.4 +/-   10.56      -0.6 +/-   10.56  0.040 / 0.080
G30     273.1          11.1               -2.1 +/-   25.68      -5.6 +/-   25.68  0.030 / 0.080