PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-18:57:50
G02     35.1           54.2               15.8 +/-    0.38      18.9 +/-    0.38  0.030 / 0.060
G05     145.3          63.2               19.6 +/-    0.70      21.7 +/-    0.70  0.050 / 0.070
G06     56.0           13.5               11.8 +/-    1.84      30.4 +/-    1.84  0.030 / 0.040
G12     195.4          63.4               16.8 +/-    0.73      18.5 +/-    0.73  0.030 / 0.040
G20     198.5          30.8               19.3 +/-    1.61      33.3 +/-    1.61  0.030 / 0.030
G25     285.6          58.5               16.1 +/-    1.09      18.6 +/-    1.09  0.040 / 0.040
G29     311.5          33.4               12.9 +/-    1.65      21.0 +/-    1.65  0.080 / 0.090