PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/08-21:27:50
G05     49.8           17.5                8.0 +/-    0.99      18.8 +/-    0.99  0.060 / 0.060
G10     239.4          15.1               15.3 +/-    1.89      38.1 +/-    1.89  0.050 / 0.080
G13     71.6           37.0                8.8 +/-    0.45      13.4 +/-    0.45  0.150 / 0.260
G15     117.4          54.8                9.8 +/-    0.58      11.7 +/-    0.58  0.180 / 0.250
G16     312.6          12.1                7.2 +/-    1.29      19.2 +/-    1.29  0.150 / 0.380
G18     250.2          45.6                8.4 +/-    0.91      11.2 +/-    0.91  0.120 / 0.410
G20     32.5           61.3               10.1 +/-    0.39      11.3 +/-    0.39  0.060 / 0.140
G21     318.2          51.0               11.3 +/-    1.38      14.1 +/-    1.38  0.070 / 0.110
G26     285.8          19.0                8.1 +/-    1.22      18.2 +/-    1.22  0.070 / 0.170
G29     157.1          62.9               11.5 +/-    0.92      12.7 +/-    0.92  0.070 / 0.160