PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/27-19:27:40
G02     40.4           49.7               18.6 +/-    0.88      23.6 +/-    0.88  0.040 / 0.050
G05     132.0          68.2               21.9 +/-    0.82      23.4 +/-    0.82  0.050 / 0.060
G12     191.3          56.5               20.3 +/-    1.38      23.8 +/-    1.38  0.040 / 0.060
G20     199.5          37.2               22.6 +/-    1.14      34.4 +/-    1.14  0.050 / 0.050
G25     272.3          60.1               19.6 +/-    1.14      22.2 +/-    1.14  0.040 / 0.080
G29     315.6          38.1               18.5 +/-    1.18      27.8 +/-    1.18  0.040 / 0.080