PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-19:27:40
G02     69.4           25.2               16.5 +/-    1.46      32.1 +/-    1.46  0.080 / 0.080
G05     48.4           54.4               16.2 +/-    0.69      19.5 +/-    0.69  0.050 / 0.070
G12     182.8          19.9               20.6 +/-    1.40      45.5 +/-    1.40  0.090 / 0.140
G13     119.6          23.5               20.3 +/-    1.09      41.0 +/-    1.09  0.110 / 0.130
G15     157.1          21.9               21.4 +/-    1.39      45.0 +/-    1.39  0.040 / 0.040
G18     222.0          11.7                2.2 +/-   32.43       6.0 +/-   32.43  0.030 / 0.040
G20     218.2          74.5               17.5 +/-    0.53      18.1 +/-    0.53  0.020 / 0.030
G21     281.8          25.9               17.1 +/-    1.41      32.7 +/-    1.41  0.020 / 0.030
G25     218.1          40.4               18.7 +/-    1.49      27.0 +/-    1.49  0.040 / 0.040
G29     342.6          70.8               16.6 +/-    0.78      17.5 +/-    0.78  0.040 / 0.030