PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/19-17:57:10
G02     36.6           51.9                9.2 +/-    1.05      11.3 +/-    1.05  0.240 / 0.440
G05     126.6          67.0               11.3 +/-    0.32      12.1 +/-    0.32  0.210 / 0.410
G06     57.5           9.9                 7.4 +/-    1.26      20.6 +/-    1.26  0.050 / 0.050
G12     192.4          60.8               10.3 +/-    0.56      11.6 +/-    0.56  0.050 / 0.050
G25     286.6          56.3                7.8 +/-    1.57       9.2 +/-    1.57  0.030 / 0.040
G29     311.9          33.1                9.6 +/-    1.24      15.8 +/-    1.24  0.040 / 0.050