PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-01:58:10
G02     40.6           48.4                5.9 +/-    0.45       7.6 +/-    0.45  0.030 / 0.040
G05     117.9          67.5                7.6 +/-    0.66       8.1 +/-    0.66  0.040 / 0.040
G06     57.1           12.4                6.2 +/-    0.79      16.3 +/-    0.79  0.030 / 0.040
G12     195.7          61.4                8.5 +/-    1.00       9.5 +/-    1.00  0.030 / 0.050
G25     282.3          57.8                6.2 +/-    0.63       7.2 +/-    0.63  0.030 / 0.040
G29     315.0          37.6                7.5 +/-    1.15      11.3 +/-    1.15  0.040 / 0.040