PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-20:27:50
G10     261.7          35.2               13.8 +/-    1.03      21.8 +/-    1.03  0.050 / 0.040
G13     44.5           21.8                9.8 +/-    2.74      20.7 +/-    2.74  0.050 / 0.030
G15     71.0           56.5               10.7 +/-    0.43      12.5 +/-    0.43  0.110 / 0.260
G16     283.3          13.7               10.1 +/-    1.62      25.9 +/-    1.62  0.130 / 0.230
G20     288.2          57.9               10.8 +/-    1.67      12.5 +/-    1.67  0.200 / 0.300
G21     352.4          68.6               11.5 +/-    0.71      12.3 +/-    0.71  0.320 / 0.350
G24     122.1          11.6               13.5 +/-    3.01      36.4 +/-    3.01  0.070 / 0.080
G27     321.1          13.8                9.2 +/-    3.08      23.5 +/-    3.08  0.120 / 0.100
G29     167.3          37.1               12.7 +/-    1.14      19.4 +/-    1.14  0.290 / 0.360