PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/25-19:12:30
G02     30.6           57.8               14.6 +/-    0.57      16.9 +/-    0.57  0.040 / 0.060
G05     150.6          59.4               18.6 +/-    0.92      21.2 +/-    0.92  0.040 / 0.060
G06     53.7           16.5               10.3 +/-    0.72      24.7 +/-    0.72  0.050 / 0.040
G12     199.5          68.0               15.3 +/-    1.07      16.4 +/-    1.07  0.040 / 0.040
G20     197.9          26.7               20.0 +/-    2.21      37.7 +/-    2.21  0.050 / 0.110
G25     293.1          56.7               15.1 +/-    0.90      17.7 +/-    0.90  0.050 / 0.110
G29     308.3          30.0               14.6 +/-    1.36      25.5 +/-    1.36  0.030 / 0.040