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               13.1 +/-    0.56      13.3 +/-    0.56  0.030 / 0.030
G05     165.3          29.7               18.1 +/-    1.35      31.9 +/-    1.35  0.020 / 0.040
G06     40.8           44.0               11.9 +/-    0.73      16.3 +/-    0.73  0.070 / 0.100
G12     317.0          66.9               13.6 +/-    0.35      14.6 +/-    0.35  0.080 / 0.090
G17     81.0           16.8               13.5 +/-    2.95      32.0 +/-    2.95  0.130 / 0.210
G19     69.8           31.4               13.5 +/-    0.95      22.9 +/-    0.95  0.150 / 0.220
G24     232.0          25.9               16.1 +/-    2.64      30.8 +/-    2.64  0.060 / 0.040
G25     317.8          23.8               11.3 +/-    1.88      22.7 +/-    1.88  0.040 / 0.050