PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-19:57:30
G02     56.2           36.2               13.7 +/-    1.90      21.3 +/-    1.90  0.090 / 0.070
G05     71.2           68.8               15.6 +/-    0.27      16.6 +/-    0.27  0.060 / 0.080
G12     185.7          35.6               15.9 +/-    1.38      24.9 +/-    1.38  0.180 / 0.400
G13     132.3          12.9               19.2 +/-    3.61      50.2 +/-    3.61  0.320 / 0.670
G20     205.5          57.5               17.2 +/-    0.50      20.0 +/-    0.50  0.050 / 0.090
G21     268.7          16.0               16.2 +/-    1.32      39.4 +/-    1.32  0.070 / 0.100
G25     234.8          53.3               16.4 +/-    2.75      19.9 +/-    2.75  0.130 / 0.340
G29     328.6          54.6               14.8 +/-    0.64      17.7 +/-    0.64  0.120 / 0.330