PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/25-20:57:50
G10     253.1          27.9               18.9 +/-    1.93      34.7 +/-    1.93  0.090 / 0.250
G13     52.1           29.7               13.4 +/-    1.78      23.6 +/-    1.78  0.110 / 0.270
G15     80.8           56.7               15.6 +/-    0.79      18.2 +/-    0.79  0.040 / 0.050
G16     296.6          13.8               15.6 +/-    0.91      39.9 +/-    0.91  0.040 / 0.040
G18     274.0          58.0               16.4 +/-    0.79      19.0 +/-    0.79  0.040 / 0.080
G20     44.8           45.9               13.5 +/-    0.52      18.0 +/-    0.52  0.050 / 0.080
G21     339.9          63.5               15.6 +/-    0.62      17.2 +/-    0.62  0.090 / 0.340
G26     269.1          14.1               18.6 +/-    1.02      47.3 +/-    1.02  0.080 / 0.290
G29     163.6          42.1               19.0 +/-    1.02      26.7 +/-    1.02  0.080 / 0.160