PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/28-18:57:50
G02     29.6           58.6               11.8 +/-    0.48      13.6 +/-    0.48  0.040 / 0.050
G05     152.4          58.1               15.8 +/-    0.73      18.2 +/-    0.73  0.040 / 0.050
G06     53.0           17.5                8.4 +/-    0.64      19.6 +/-    0.64  0.040 / 0.040
G12     201.4          69.3                9.9 +/-    0.50      10.6 +/-    0.50  0.030 / 0.050
G20     197.8          25.4               16.5 +/-    2.82      31.9 +/-    2.82  0.030 / 0.050
G25     295.3          55.8               11.3 +/-    1.76      13.3 +/-    1.76  0.040 / 0.050
G29     307.5          29.2                9.0 +/-    1.04      16.0 +/-    1.04  0.050 / 0.120