PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-18:43:00
G02     28.5           59.4               14.9 +/-    0.74      17.0 +/-    0.74  0.040 / 0.100
G05     154.1          56.7               19.5 +/-    1.13      22.9 +/-    1.13  0.040 / 0.060
G06     52.4           18.5               12.6 +/-    1.32      28.7 +/-    1.32  0.030 / 0.040
G12     203.6          70.7               15.3 +/-    0.90      16.1 +/-    0.90  0.030 / 0.040
G20     197.7          24.1               20.2 +/-    0.98      40.3 +/-    0.98  0.030 / 0.040
G25     297.3          55.0               15.6 +/-    0.92      18.6 +/-    0.92  0.030 / 0.050
G29     306.7          28.4               11.4 +/-    1.19      20.6 +/-    1.19  0.070 / 0.100