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Bringing the Visible Universe into Focus with Robo-AO
10:35

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Published on: February 12, 2013

Improved upper winds models for several astronomical observatories.

Lewis C Roberts1, L William Bradford

  • 1Jet Propulsion Laboratory, California Institute of Technology, Pasadena CA 91009, USA. lewis.c.roberts@jpl.nasa.gov

Optics Express
|January 26, 2011
PubMed
Summary
This summary is machine-generated.

Accurate wind profiles are essential for atmospheric turbulence modeling. This study confirms and extends the Greenwood wind profile using 30 years of data, improving models for adaptive optics and laser communications.

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Area of Science:

  • Atmospheric Science
  • Astronomy
  • Optical Engineering

Background:

  • Understanding wind speed and direction with height is crucial for atmospheric turbulence modeling.
  • Radiosonde data near astronomical observatories provides valuable atmospheric insights.

Purpose of the Study:

  • To create averaged wind speed and direction profiles.
  • To compute Richardson number profiles for turbulence analysis.
  • To extend the 1977 Greenwood wind profile with seasonal and location-specific parameters.

Main Methods:

  • Utilized 30 years of radiosonde data from observatory launch sites.
  • Averaged wind speed and direction profiles were computed.
  • Richardson number profiles were calculated to identify turbulent layers.

Main Results:

  • Confirmed the 1977 Greenwood wind profile.
  • Extended the profile with parameters accounting for seasonal variations and geographical location.
  • Identified persistent turbulent layers through low Richardson number values in averaged data.

Conclusions:

  • The enhanced wind profiles provide critical data for adaptive optics and imaging systems.
  • Knowledge of persistent turbulent layers aids in planning for adaptive optics and laser communications.