PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-03:12:50
G02     46.9           43.1                8.1 +/-    0.77      11.2 +/-    0.77  0.290 / 0.450
G05     95.6           68.7                8.4 +/-    0.75       9.0 +/-    0.75  0.130 / 0.360
G12     189.3          51.4               12.5 +/-    0.64      15.5 +/-    0.64  0.030 / 0.040
G20     211.3          11.3                0.2 +/-   24.29       0.6 +/-   24.29  0.040 / 0.040
G25     270.6          58.0                7.6 +/-    1.68       8.8 +/-    1.68  0.040 / 0.030
G29     317.1          39.1                8.2 +/-    0.99      12.1 +/-    0.99  0.030 / 0.030