Wingtip Vortices

VHF/UHF WSPR
Wingtip Vortices

Suspected aircraft wingtip vortex echoes detected at station KE6GLA at 2058 and 2108 UTC on 2 meter WSPR signals.

28. 11 Aug 2012 - Suspected aircraft wingtip vortex echoes detected at station KE6GLA at 2058 and 2108 UTC on 2 meter WSPR signals.


Suspected aircraft wingtip vortex echoes detected on 2 meter WSPR signal at station N6GN.

29. Suspected aircraft wingtip vortex echoes detected on 2 meter WSPR signal at station N6GN.


02 Oct 2012 1338 UTC - Spectran analysis of the final 80 seconds of N6YG 2 meter WSPR signal showing the discrete tones and about 25 Hz negative frequency drift over the period. Moving symmetric side images 35 dB down from main signal are observed. The corresponding WSPR waterfall segment is on the right.

30. 02 Oct 2012 1338 UTC - Spectran analysis of the final 80 seconds of a 2 meter WSPR signal showing the discrete tones.  This signal did not decode due to the 25 Hz negative frequency drift over the period. Moving symmetric side images 35 dB down from main signal are observed. The corresponding WSPR waterfall segment is on the right.



REFERENCES

  1. Aircraft Scatter (ACS), Larsson I, SM6FHZ
  2. WSPRnet.org
  3. Hepburn's Tropospheric Ducting Forecasts
  4. California Temperature Inversions, Iacobellis et al.
  5. 144 MHz Propagation Study across the Alps
  6. 144 MHz WSPR Operations in Australia

LINKS

  1. 2 Meter WSPR Discussion Group
  2. 144 MHz WSPR Study Photo Album
  3. 144 MHz WSPR Study Spot Database
  4. 144 MHz WSPR Study Videos - KP4MD
  5. 144 MHz WSPR Study Videos - KC6KGE
  6. 144 MHz WSPR Study Videos - N6GN
  7. 2m WSPR (Radio Stability (M1GEO)
  8. Australian 2m WSPR Group
  9. Idiot's Guide to 144 MHz WSPR (VK3BQ)
  10. WSPR Propagation Study Paths Map
  11. Google Earth KML File
  12. Current WSPRnet 144 MHz Spot Reports
  13. WSPR Spot Report Analysis Spreadsheet with Charts

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