PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-23:43:00
G02     301.2          81.7                8.8 +/-    0.81       8.9 +/-    0.81  0.030 / 0.030
G05     166.6          26.8               14.7 +/-    2.94      27.6 +/-    2.94  0.030 / 0.040
G06     40.3           46.9                8.2 +/-    0.96      10.7 +/-    0.96  0.110 / 0.190
G12     319.1          63.8                9.9 +/-    0.45      10.9 +/-    0.45  0.070 / 0.210
G17     78.5           18.6               10.3 +/-    2.10      23.6 +/-    2.10  0.070 / 0.120
G19     66.8           33.3                9.7 +/-    2.32      15.9 +/-    2.32  0.080 / 0.120
G24     234.5          28.0               14.3 +/-    0.96      26.1 +/-    0.96  0.040 / 0.050
G25     317.8          21.1                7.9 +/-    2.39      17.0 +/-    2.39  0.050 / 0.040