PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-00:57:40
G02     250.9          78.8                9.3 +/-    0.44       9.4 +/-    0.44  0.070 / 0.040
G05     169.8          19.0               16.7 +/-    2.12      37.8 +/-    2.12  0.060 / 0.040
G06     40.3           56.1                9.0 +/-    0.46      10.6 +/-    0.46  0.050 / 0.040
G12     321.5          54.0               10.0 +/-    0.72      12.1 +/-    0.72  0.050 / 0.040
G17     70.7           24.7               11.6 +/-    0.89      22.8 +/-    0.89  0.140 / 0.150
G19     58.6           38.1               10.1 +/-    0.86      15.2 +/-    0.86  0.090 / 0.150
G24     243.1          33.6               13.7 +/-    1.96      22.3 +/-    1.96  0.110 / 0.120
G25     317.0          13.3                8.0 +/-    4.00      20.8 +/-    4.00  0.100 / 0.120