PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-20:27:30
G10     286.2          47.1               16.6 +/-    1.41      21.7 +/-    1.41  0.080 / 0.080
G15     47.9           34.5               14.5 +/-    0.66      23.1 +/-    0.66  0.060 / 0.120
G18     342.0          67.0               16.6 +/-    0.61      17.9 +/-    0.61  0.040 / 0.050
G20     65.9           23.5               15.4 +/-    0.82      31.1 +/-    0.82  0.050 / 0.060
G21     75.5           75.5               17.8 +/-    0.65      18.4 +/-    0.65  0.070 / 0.170
G24     106.8          23.1               19.8 +/-    1.62      40.4 +/-    1.62  0.090 / 0.180
G27     306.5          31.4               17.2 +/-    1.31      29.2 +/-    1.31  0.050 / 0.050
G29     166.1          9.8                22.3 +/-    1.69      62.5 +/-    1.69  0.050 / 0.040
G32     208.7          22.0               21.3 +/-    3.45      44.6 +/-    3.45  0.090 / 0.130