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                9.1 +/-    0.79      12.6 +/-    0.79  0.030 / 0.060
G05     95.6           68.7                9.9 +/-    0.72      10.5 +/-    0.72  0.040 / 0.050
G12     189.3          51.4               12.3 +/-    1.14      15.2 +/-    1.14  0.030 / 0.040
G20     211.3          11.3                1.1 +/-   27.73       2.9 +/-   27.73  0.020 / 0.040
G25     270.6          58.0               11.3 +/-    0.49      13.0 +/-    0.49  0.050 / 0.080
G29     317.1          39.1               10.3 +/-    1.14      15.2 +/-    1.14  0.040 / 0.070