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Doppler Wind Experiment (DWE)

NSSDCA ID: 1989-084E-08

Mission Name: Galileo Probe

Description

The Doppler Wind Experiment (DWE) was designed to extract the zonal (east-west) motion of the Galileo entry probe during its descent into the atmosphere of Jupiter on 7 December 1995.

Both the Galileo probe and orbiter were equipped with ultra stable oscillators (USOs) for the purpose of generating and measuring a very stable telemetry signal from the probe to orbiter. The orbiter measured the probe radio signal frequency every 2/3 s and stored the frequency data on the tape recorder. Half-resolution data (4/3 s) were also stored in solid state memory. As the probe drifted due to winds in the atmosphere of Jupiter, a measurable Doppler shift was induced in the probe carrier signal. The DWE analyzed these Doppler shifts to determine the vertical profile of the atmospheric zonal winds.

Alternate Names

  • DWE
  • GalileoProbe/DopplerWindExperiment(DWE)
  • urn:nasa:pds:context:instrument:gp.dwe

Discipline

  • Planetary Science: Atmospheres

Additional Information

Questions and comments about this experiment can be directed to: Dr. Edwin V. Bell, II

 

Personnel

NameRoleOriginal AffiliationE-mail

Selected References

  • Pollack, J. B., et al., Retrieval of a wind profile from the Galileo probe telemetry signal, Space Sci. Rev., 60, No. 1/4, 143-178, doi:10.1007/BF00216853, May 1992.
  • Atkinson, D. H., et al., The Galileo Probe Doppler Wind Experiment: Measurement of the deep zonal winds on Jupiter, J. Geophys. Res., 103, No. E10, 22911-22928, doi:10.1029/98JE00060, Sept. 1998.
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