PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-20:43:10
G10     261.6          35.0                9.8 +/-    1.63      15.6 +/-    1.63  0.060 / 0.040
G13     44.6           22.0                7.9 +/-    1.74      16.6 +/-    1.74  0.050 / 0.040
G15     71.6           56.8                8.1 +/-    0.44       9.5 +/-    0.44  0.210 / 0.400
G16     283.4          13.8                7.9 +/-    2.04      20.1 +/-    2.04  0.150 / 0.550
G20     287.9          57.8                8.1 +/-    1.61       9.4 +/-    1.61  0.110 / 0.270
G21     351.8          68.4                8.6 +/-    1.01       9.2 +/-    1.01  0.120 / 0.290
G24     122.3          11.5               11.1 +/-    2.23      30.0 +/-    2.23  0.250 / 0.370
G27     321.1          13.7                6.5 +/-    2.62      16.7 +/-    2.62  0.310 / 0.360
G29     167.3          37.4               10.2 +/-    1.06      15.6 +/-    1.06  0.350 / 0.270