PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/22-08:57:50
G02     34.6           54.5                4.2 +/-    0.96       5.0 +/-    0.96  0.030 / 0.030
G05     139.4          61.5                6.2 +/-    0.82       7.0 +/-    0.82  0.030 / 0.030
G06     52.2           20.0                4.9 +/-    3.14      10.8 +/-    3.14  0.030 / 0.030
G12     205.4          70.0                5.6 +/-    0.48       5.9 +/-    0.48  0.030 / 0.030
G19     99.6           9.9                 8.0 +/-    3.10      22.4 +/-    3.10  0.110 / 0.170
G20     200.1          21.6                4.7 +/-    2.26       9.9 +/-    2.26  0.180 / 0.260
G25     299.0          52.4                4.6 +/-    1.85       5.7 +/-    1.85  0.130 / 0.210
G29     307.8          29.3                1.9 +/-    1.23       3.4 +/-    1.23  0.280 / 0.230