PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-04:27:40
G03     208.7          53.7                5.1 +/-    0.63       6.1 +/-    0.63  0.120 / 0.280
G07     261.9          20.7                4.2 +/-    3.04       9.1 +/-    3.04  0.110 / 0.260
G09     313.2          33.5                1.8 +/-    1.51       3.0 +/-    1.51  0.230 / 0.250
G16     79.4           62.2                3.8 +/-    0.69       4.2 +/-    0.69  0.210 / 0.240
G22     189.0          37.2                4.4 +/-    1.15       6.7 +/-    1.15  0.060 / 0.090
G23     338.2          66.1                4.4 +/-    0.44       4.7 +/-    0.44  0.080 / 0.110
G26     49.8           38.3                3.6 +/-    0.96       5.4 +/-    0.96  0.050 / 0.050
G27     130.5          13.7                5.0 +/-    1.89      12.9 +/-    1.89  0.050 / 0.040