PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-06:57:50
G03     190.0          16.0                5.0 +/-    2.47      12.1 +/-    2.47  0.040 / 0.030
G07     299.3          43.1                3.8 +/-    1.09       5.3 +/-    1.09  0.030 / 0.030
G08     133.5          34.8                8.7 +/-    0.94      13.8 +/-    0.94  0.040 / 0.070
G09     317.9          72.5                3.7 +/-    0.79       3.9 +/-    0.79  0.050 / 0.060
G16     41.7           35.7                3.5 +/-    0.67       5.6 +/-    0.67  0.040 / 0.090
G23     133.1          74.5                4.2 +/-    1.13       4.3 +/-    1.13  0.050 / 0.090
G27     88.7           35.9                4.6 +/-    0.77       7.1 +/-    0.77  0.050 / 0.100
G30     278.8          16.2                6.5 +/-    1.81      15.8 +/-    1.81  0.050 / 0.080