PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/30-17:57:40
G02     30.5           57.4                7.9 +/-    0.53       9.2 +/-    0.53  0.020 / 0.040
G05     139.6          62.6                9.5 +/-    1.01      10.6 +/-    1.01  0.030 / 0.030
G06     54.9           13.1                7.8 +/-    1.98      20.3 +/-    1.98  0.030 / 0.040
G12     188.0          63.2                7.9 +/-    0.68       8.8 +/-    0.68  0.030 / 0.030
G19     99.3           12.4                9.2 +/-    2.44      24.4 +/-    2.44  0.050 / 0.050
G25     294.6          54.9                6.3 +/-    4.70       7.6 +/-    4.70  0.040 / 0.050
G29     307.1          27.2                7.0 +/-    1.73      13.0 +/-    1.73  0.120 / 0.290