PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/29-08:27:30
G02     34.1           54.9                4.7 +/-    0.45       5.6 +/-    0.45  0.020 / 0.040
G05     140.1          61.0                5.8 +/-    1.13       6.5 +/-    1.13  0.030 / 0.030
G06     52.0           20.1                1.3 +/-    0.58       2.8 +/-    0.58  0.040 / 0.040
G12     206.3          70.6                4.9 +/-    0.66       5.2 +/-    0.66  0.030 / 0.030
G19     99.1           10.3                4.2 +/-    2.13      11.5 +/-    2.13  0.040 / 0.050
G20     200.2          20.7                5.9 +/-    1.42      12.8 +/-    1.42  0.040 / 0.050
G25     299.9          51.9                3.9 +/-    1.02       4.8 +/-    1.02  0.050 / 0.050
G29     307.2          28.6                1.0 +/-    0.85       1.7 +/-    0.85  0.050 / 0.060