PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-23:42:50
G02     301.2          81.7                9.1 +/-    0.86       9.1 +/-    0.86  0.020 / 0.040
G05     166.6          26.8               14.2 +/-    1.37      26.7 +/-    1.37  0.020 / 0.030
G06     40.3           46.9                8.6 +/-    0.59      11.3 +/-    0.59  0.050 / 0.140
G12     319.1          63.8                8.7 +/-    1.19       9.6 +/-    1.19  0.050 / 0.110
G17     78.5           18.6               10.3 +/-    1.18      23.4 +/-    1.18  0.110 / 0.260
G19     66.8           33.3               10.5 +/-    0.66      17.2 +/-    0.66  0.080 / 0.260
G24     234.5          28.0               14.7 +/-    1.86      26.8 +/-    1.86  0.080 / 0.160
G25     317.8          21.1                6.6 +/-    2.01      14.2 +/-    2.01  0.080 / 0.170