PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/03-16:57:50
G07     319.8          52.5               10.0 +/-    1.29      12.2 +/-    1.29  0.040 / 0.060
G08     118.4          48.1               12.0 +/-    1.43      15.5 +/-    1.43  0.040 / 0.060
G09     226.1          81.9               11.2 +/-    0.68      11.3 +/-    0.68  0.050 / 0.070
G16     44.3           13.2                7.0 +/-    2.21      18.2 +/-    2.21  0.040 / 0.070
G27     64.4           35.3                9.0 +/-    0.46      14.2 +/-    0.46  0.040 / 0.050
G28     230.8          22.4               12.9 +/-    1.53      26.8 +/-    1.53  0.040 / 0.060
G30     295.4          30.2               10.3 +/-    1.43      18.1 +/-    1.43  0.110 / 0.230