PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-15:13:00
G01     321.0          10.5              -16.5 +/-   25.94     -45.5 +/-   25.94  0.070 / 0.090
G08     267.8          17.0                7.5 +/-    2.51      17.6 +/-    2.51  0.070 / 0.090
G10     64.4           57.9                6.7 +/-    0.55       7.7 +/-    0.55  0.260 / 0.250
G11     311.8          16.4                7.2 +/-    2.84      17.2 +/-    2.84  0.240 / 0.350
G14     269.8          66.1                6.9 +/-    1.05       7.5 +/-    1.05  0.180 / 0.360
G21     154.2          11.1                8.7 +/-    3.06      23.6 +/-    3.06  0.260 / 0.410
G27     229.4          14.2                8.3 +/-    4.56      20.9 +/-    4.56  0.040 / 0.050
G31     177.6          33.0                8.9 +/-    2.30      14.7 +/-    2.30  0.050 / 0.060
G32     347.7          72.8                7.1 +/-    0.83       7.4 +/-    0.83  0.180 / 0.330