1 / 22

HSWT#29, Florence February 28, 2005

HSWT#29, Florence February 28, 2005. DWE: Initial Results Michael Bird (Radiostronomisches Institut, Universität Bonn) And the DWE Team. DWE data: Huygens Mission. Channel B. f. Channel A. f. df/dt. df/dt. 6 hours. 3.67 hours. No power!. DWE from Earth: Geometry.

truly
Télécharger la présentation

HSWT#29, Florence February 28, 2005

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. HSWT#29, FlorenceFebruary 28, 2005 DWE: Initial Results Michael Bird (Radiostronomisches Institut, Universität Bonn) And the DWE Team

  2. DWE data: Huygens Mission Channel B f Channel A f df/dt df/dt 6 hours 3.67 hours HSWT#29, Florence

  3. No power! HSWT#29, Florence

  4. DWE from Earth: Geometry • Huygens antenna pointed only ~30° from Earth • Better SNR than for Galileo Probe detection at Jupiter • Probe velocity projection in direction to Earth nearly antiparallel to projection in direction to Orbiter HSWT#29, Florence

  5. GBT Parkes HSWT#29, Florence

  6. Huygens Radio Tracking Net 10:18 UTC-GRT 12:30 UTC-GRT HSWT#29, Florence

  7. GRT GBT Huygens! (~ -171 dBm) Flux density: 125 Jy HSWT#29, Florence

  8. GBT Detection HSWT#29, Florence

  9. Watching Huygens from JPL HSWT#29, Florence

  10. Huygens Frequency: GBT + Parkes HSWT#29, Florence

  11. Huygens Frequency: GBT + predicts HSWT#29, Florence

  12. Huygens Frequency: Parkes + Predicts predicted impact HSWT#29, Florence

  13. Parkes: Huygens Impact on Titan HSWT#29, Florence

  14. Doppler Components GBT (1) Raw Doppler (2) Only Huygens Motion (3) Huygens Descent Velocity (4) Huygens Horizontal Velocity HSWT#29, Florence

  15. HSWT#29, Florence

  16. Integrate wind velocity to obtain: DWE DISR Huygens Eastward Drift During Descent Difference HSWT#29, Florence

  17. HSWT#29, Florence

  18. DWE: Preliminary Results • Zonal winds above boundary layer are PROGRADE • Low-velocity layer between 60-80 km • Stong positive/negative wind shear • ‘Unexpected’, but evident in some GCMs • Considerable turbulence above 100 km • Near surface winds are weak (~ 1-2 m/s) HSWT#29, Florence

  19. HSWT#29, Florence

  20. Wind Shear and Stability HSWT#29, Florence

  21. Richardson Number HSWT#29, Florence

  22. Thermal Gradients HSWT#29, Florence

More Related