PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-18:57:20
G02     205.0          38.1               12.5 +/-    0.91      18.8 +/-    0.91  0.190 / 0.320
G06     145.6          74.2               12.1 +/-    0.63      12.5 +/-    0.63  0.200 / 0.240
G12     310.6          20.9               10.6 +/-    2.15      22.8 +/-    2.15  0.060 / 0.110
G17     39.1           46.8               11.2 +/-    1.35      14.6 +/-    1.35  0.060 / 0.080
G19     4.4            63.9               11.1 +/-    0.66      12.2 +/-    0.66  0.040 / 0.060
G24     292.0          40.6               14.2 +/-    8.86      20.4 +/-    8.86  0.030 / 0.050
G28     106.6          28.3               13.1 +/-    0.54      23.7 +/-    0.54  0.040 / 0.040