PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-23:57:40
G02     323.0          81.0               12.5 +/-    0.69      12.7 +/-    0.69  0.030 / 0.050
G05     165.3          29.7               18.9 +/-    1.20      33.4 +/-    1.20  0.030 / 0.050
G06     40.8           44.0               11.2 +/-    0.58      15.3 +/-    0.58  0.070 / 0.120
G12     317.0          66.9               10.6 +/-    1.23      11.5 +/-    1.23  0.050 / 0.110
G17     81.0           16.8               13.3 +/-    1.03      31.5 +/-    1.03  0.030 / 0.030
G19     69.8           31.4               13.5 +/-    0.77      22.9 +/-    0.77  0.030 / 0.040
G24     232.0          25.9               17.6 +/-    1.75      33.6 +/-    1.75  0.100 / 0.170
G25     317.8          23.8                9.9 +/-    2.58      20.0 +/-    2.58  0.110 / 0.240