PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/21-05:58:10
G03     215.9          57.6                6.5 +/-    1.47       7.5 +/-    1.47  0.030 / 0.050
G07     258.9          18.0                5.0 +/-    1.79      11.6 +/-    1.79  0.030 / 0.040
G09     312.0          31.6                4.2 +/-    1.69       7.1 +/-    1.69  0.060 / 0.070
G16     99.3           66.2                8.1 +/-    0.62       8.8 +/-    0.62  0.060 / 0.080
G22     188.3          41.0                6.9 +/-    0.82       9.9 +/-    0.82  0.120 / 0.170
G23     329.5          59.6                4.8 +/-    0.55       5.5 +/-    0.55  0.090 / 0.190
G26     54.5           45.6                6.2 +/-    0.58       8.2 +/-    0.58  0.230 / 0.340
G27     131.6          12.2                6.1 +/-    2.10      16.1 +/-    2.10  0.210 / 0.280
G31     59.4           11.5                2.9 +/-    1.44       7.7 +/-    1.44  0.030 / 0.030