PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-13:57:30
G03     201.9          46.5               13.7 +/-    1.06      18.1 +/-    1.06  0.040 / 0.080
G07     265.6          21.5               10.6 +/-    2.41      22.6 +/-    2.41  0.050 / 0.070
G09     315.3          37.3                9.1 +/-    1.13      13.8 +/-    1.13  0.080 / 0.140
G16     66.2           60.0               10.0 +/-    0.48      11.3 +/-    0.48  0.070 / 0.110
G22     182.1          27.7               10.2 +/-    1.14      18.7 +/-    1.14  0.030 / 0.030
G23     352.5          72.9               10.0 +/-    0.37      10.4 +/-    0.37  0.040 / 0.040
G26     46.1           32.5                7.4 +/-    1.05      12.3 +/-    1.05  0.060 / 0.070
G27     125.6          18.1               12.0 +/-    1.26      27.6 +/-    1.26  0.050 / 0.060