PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/27-18:42:20
G02     44.2           46.4                9.3 +/-    0.82      12.3 +/-    0.82  0.030 / 0.040
G05     100.4          69.8               11.8 +/-    0.46      12.4 +/-    0.46  0.030 / 0.030
G12     183.6          46.6               14.9 +/-    1.46      19.6 +/-    1.46  0.040 / 0.080
G25     265.7          58.9               11.6 +/-    0.88      13.3 +/-    0.88  0.040 / 0.060
G29     316.9          38.6               10.1 +/-    0.88      15.0 +/-    0.88  0.040 / 0.060