PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/16-16:28:10
G02     47.2           43.0                9.2 +/-    0.46      12.8 +/-    0.46  0.040 / 0.040
G05     94.1           70.4                8.6 +/-    0.48       9.1 +/-    0.48  0.040 / 0.050
G12     186.3          47.1               11.0 +/-    1.22      14.4 +/-    1.22  0.050 / 0.060
G25     263.2          57.9               11.5 +/-    1.19      13.4 +/-    1.19  0.030 / 0.070
G29     319.4          41.8               10.5 +/-    1.16      14.8 +/-    1.16  0.030 / 0.030