PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-23:12:30
G02     203.8          38.9               14.0 +/-    1.64      20.7 +/-    1.64  0.110 / 0.170
G06     153.0          72.5               12.8 +/-    1.04      13.3 +/-    1.04  0.090 / 0.150
G12     309.3          17.7                9.8 +/-    1.31      22.8 +/-    1.31  0.060 / 0.160
G17     35.0           50.4                9.3 +/-    0.56      11.6 +/-    0.56  0.060 / 0.170
G19     5.3            63.9                9.3 +/-    0.42      10.3 +/-    0.42  0.070 / 0.100
G24     294.5          39.5               11.2 +/-    0.80      16.4 +/-    0.80  0.080 / 0.080
G28     105.7          28.8               11.8 +/-    0.66      21.2 +/-    0.66  0.040 / 0.090