PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/17-14:27:10
G02     50.7           39.6                3.6 +/-    1.38       5.3 +/-    1.38  0.020 / 0.030
G05     89.4           70.8                5.3 +/-    0.54       5.6 +/-    0.54  0.020 / 0.030
G12     184.4          43.1                7.5 +/-    1.83      10.4 +/-    1.83  0.040 / 0.050
G25     257.2          57.5                5.6 +/-    0.96       6.5 +/-    0.96  0.040 / 0.040
G29     320.9          43.7                5.5 +/-    0.81       7.6 +/-    0.81  0.050 / 0.060