PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-19:12:30
G02     250.2          76.8               10.7 +/-    0.66      11.0 +/-    0.66  0.060 / 0.210
G05     170.5          19.2               13.6 +/-    1.52      30.5 +/-    1.52  0.060 / 0.210
G06     40.4           53.1               10.0 +/-    0.56      12.1 +/-    0.56  0.020 / 0.050
G12     322.2          59.0                9.8 +/-    0.73      11.3 +/-    0.73  0.030 / 0.050
G17     73.7           20.3               10.0 +/-    0.62      21.8 +/-    0.62  0.080 / 0.120
G19     58.3           38.9                9.5 +/-    0.82      14.0 +/-    0.82  0.070 / 0.120
G24     240.3          32.6               14.0 +/-    1.31      23.2 +/-    1.31  0.190 / 0.440
G25     317.2          15.5                8.6 +/-    2.00      21.2 +/-    2.00  0.160 / 0.450