PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-19:57:40
G10     270.0          39.2               23.2 +/-    1.53      34.1 +/-    1.53  0.090 / 0.120
G13     41.2           17.4               15.7 +/-    1.40      36.8 +/-    1.40  0.090 / 0.130
G15     56.0           46.0               18.5 +/-    0.78      24.6 +/-    0.78  0.050 / 0.080
G16     281.3          10.1               20.6 +/-    3.10      57.3 +/-    3.10  0.050 / 0.050
G18     309.1          65.7               19.1 +/-    0.81      20.8 +/-    0.81  0.050 / 0.120
G20     56.3           33.1               16.9 +/-    0.57      27.8 +/-    0.57  0.060 / 0.120
G21     20.3           74.4               20.1 +/-    0.69      20.8 +/-    0.69  0.040 / 0.050
G24     119.1          15.7               24.6 +/-    2.73      60.1 +/-    2.73  0.040 / 0.060
G27     316.3          22.5               18.2 +/-    1.85      37.7 +/-    1.85  0.090 / 0.460
G29     165.9          22.8               23.4 +/-    1.54      48.1 +/-    1.54  0.080 / 0.570