PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-07:27:40
G02     34.6           54.4                2.3 +/-    0.98       2.7 +/-    0.98  0.020 / 0.030
G05     138.4          61.7                5.5 +/-    0.34       6.1 +/-    0.34  0.020 / 0.030
G06     52.6           19.0                1.4 +/-    2.64       3.2 +/-    2.64  0.170 / 0.340
G12     204.9          69.9                3.8 +/-    0.49       4.0 +/-    0.49  0.140 / 0.280
G19     99.5           10.1                5.5 +/-    2.02      15.2 +/-    2.02  0.160 / 0.160
G20     200.6          20.7                3.9 +/-    2.16       8.3 +/-    2.16  0.180 / 0.240
G25     299.2          52.1                3.2 +/-    1.94       3.9 +/-    1.94  0.020 / 0.030
G29     307.4          28.5                1.0 +/-    1.49       1.8 +/-    1.49  0.020 / 0.030