PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/27-17:42:50
G02     43.4           46.5                7.5 +/-    0.85       9.8 +/-    0.85  0.040 / 0.080
G05     103.5          70.0                9.4 +/-    0.72      10.0 +/-    0.72  0.050 / 0.060
G12     188.2          51.7               11.2 +/-    0.98      13.8 +/-    0.98  0.040 / 0.050
G25     270.7          58.1               10.3 +/-    0.41      11.9 +/-    0.41  0.050 / 0.060
G29     317.2          39.2                8.5 +/-    1.23      12.5 +/-    1.23  0.030 / 0.040