PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/09-17:42:30
G03     187.8          16.6               13.2 +/-    1.42      31.7 +/-    1.42  0.080 / 0.100
G07     292.8          38.6               12.6 +/-    1.72      18.8 +/-    1.72  0.070 / 0.110
G08     144.0          28.8               16.1 +/-    1.49      28.9 +/-    1.49  0.020 / 0.030
G09     319.5          65.0               12.9 +/-    0.96      14.1 +/-    0.96  0.030 / 0.030
G16     42.1           35.2               11.6 +/-    1.02      18.3 +/-    1.02  0.110 / 0.100
G23     126.5          72.6               13.8 +/-    0.68      14.4 +/-    0.68  0.130 / 0.110
G27     95.2           34.9               14.6 +/-    0.92      23.2 +/-    0.92  0.070 / 0.080
G30     276.7          16.0               14.2 +/-    1.18      34.4 +/-    1.18  0.100 / 0.110