PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/21-21:42:40
G10     265.4          36.5               16.1 +/-    1.40      24.8 +/-    1.40  0.100 / 0.070
G13     43.3           20.9               12.1 +/-    2.29      26.0 +/-    2.29  0.080 / 0.050
G15     60.9           49.9               14.5 +/-    0.83      18.3 +/-    0.83  0.210 / 0.370
G16     284.0          11.6               14.8 +/-    2.91      39.8 +/-    2.91  0.240 / 0.260
G18     298.0          64.0               15.3 +/-    0.95      16.8 +/-    0.95  0.190 / 0.360
G20     53.7           35.5               14.3 +/-    2.12      22.4 +/-    2.12  0.230 / 0.350
G21     3.7            71.8               16.2 +/-    0.84      17.0 +/-    0.84  0.120 / 0.130
G24     122.6          13.1               17.6 +/-    2.03      45.8 +/-    2.03  0.110 / 0.210
G27     318.4          19.2               14.1 +/-    1.26      31.6 +/-    1.26  0.080 / 0.090
G29     166.1          28.5               17.3 +/-    1.21      31.2 +/-    1.21  0.050 / 0.090