PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-21:28:10
G10     262.7          34.8               15.8 +/-    1.16      25.2 +/-    1.16  0.160 / 0.310
G13     44.7           22.8               11.0 +/-    1.35      22.5 +/-    1.35  0.040 / 0.050
G15     64.1           51.7               14.9 +/-    0.52      18.4 +/-    0.52  0.040 / 0.050
G16     286.5          12.3               16.3 +/-    1.52      43.3 +/-    1.52  0.190 / 0.440
G18     292.7          63.0               14.1 +/-    0.40      15.6 +/-    0.40  0.170 / 0.440
G20     51.9           37.6               11.8 +/-    0.56      17.8 +/-    0.56  0.050 / 0.090
G21     357.8          70.2               14.4 +/-    0.37      15.2 +/-    0.37  0.040 / 0.090
G24     124.7          11.5              -16.4 +/-   28.37     -44.1 +/-   28.37  0.110 / 0.170
G27     319.5          17.2               12.4 +/-    1.63      29.2 +/-    1.63  0.120 / 0.150
G29     165.7          31.2               17.5 +/-    1.91      29.9 +/-    1.91  0.070 / 0.250