PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-21:12:50
G10     262.9          34.9               18.9 +/-    1.31      30.1 +/-    1.31  0.160 / 0.310
G13     44.6           22.7               15.8 +/-    2.31      32.5 +/-    2.31  0.160 / 0.330
G15     63.8           51.4               19.5 +/-    1.33      24.2 +/-    1.33  0.050 / 0.070
G16     286.6          12.2               17.7 +/-    1.84      47.1 +/-    1.84  0.040 / 0.050
G18     293.2          63.1               17.3 +/-    0.61      19.1 +/-    0.61  0.190 / 0.460
G20     52.0           37.6               16.8 +/-    0.88      25.5 +/-    0.88  0.170 / 0.440
G21     358.6          70.4               18.3 +/-    0.66      19.3 +/-    0.66  0.110 / 0.130
G24     124.6          11.6               -6.9 +/-   50.52     -18.5 +/-   50.52  0.110 / 0.140
G27     319.4          17.3               14.8 +/-    1.31      34.8 +/-    1.31  0.070 / 0.240
G29     165.6          30.8               20.3 +/-    1.52      35.0 +/-    1.52  0.070 / 0.260