Dr. Sheldon D. Stokes Profile

Dr. Sheldon D. Stokes

at BlueHalo

SPIE Involvement:

Author

Publications (8)

Proceedings Article | 12 December 2003 Paper

Error evaluation template for use with imaging spectro-polarimeters

James Boger, Sheldon Stokes, David Bowers, Brad Ratliff, Matthew Fetrow

Proceedings Volume 5158, (2003) https://doi.org/10.1117/12.508650

KEYWORDS: Polarimetry, Error analysis, Wave plates, Polarization, Instrument modeling, Data modeling, Sensors, Data acquisition, Calibration, Error control coding

Read Abstract +

Proceedings Article | 21 August 2003 Paper

Refractivity turbulence, inner scale, and eddy dissipation rate observations using a balloon-ring platform

Frank Eaton, Patrick Kelly, Demos Kyrazis, Sheldon Stokes

Proceedings Volume 5087, (2003) https://doi.org/10.1117/12.487745

KEYWORDS: Temperature metrology, Sensors, Turbulence, Atmospheric propagation, Laser beam propagation, Contamination, Electronics, Refractive index, Temperature sensors, Calibration

Read Abstract +

Proceedings Article | 25 June 2002 Paper

Refractivity turbulence observations using a new balloon-ring platform

Frank Eaton, Patrick Kelly, Demos Kyrazis, Sheldon Stokes

Proceedings Volume 4724, (2002) https://doi.org/10.1117/12.472364

KEYWORDS: Radar, Turbulence, Sensors, Temperature metrology, Laser beam propagation, Scattering, Refractive index, Contamination, Laser systems engineering, Optical turbulence

Read Abstract +

This paper present new methodology to address critical refractivity turbulence issues for laser propagation using a new measurement system-a portable balloon-ring platform with multiple fine wire sensors at several separations. All raw data is transmitted to a ground station-allowing spectra to be calculated. The new platform is discussed and preliminary examples of observations, including artifacts, are shown and discussed. This new platform provides capabilities during the daytime as well as nighttime-unlike conventional thermosondes that are used only at night. Such all time observations are important due to the pronounced diurnal variation in the planetary boundary layer where many laser systems are operated. Plans to address the longstanding concern of wake contamination on systems suspended below a balloon quantitatively will be presented. The objective of this effort is to develop the capability that can address several questions related to laser propagation such as: 1) Is the atmospheric isotropic for the scales of interest? 2) Is the turbulence Kolmogorov under various atmospheric conditions, or how often is the structure function represendted by the r^2/3 law? 3) what are the profiles of inner and outer scale? 4) To what degree does wake contamination affect conventional thermosonde measurements? 5) Does fine structure within the scattering volume sensed by radar affect refractive index structure parameter (C_n²) and eddy dissipation rate (epsilon) estimates? These questions and concerns will be addressed by making the appropriate observations using the balloon-ring platform. Many of the measurements will be taken at Vandenberg AFB since the Western Test Range operates a ground receiving station, balloon launch facility, VHF radar, boundary layer radars, sodars, and instrumented towers that will enhance this effort. This effort provides an observation platform that will ultimately lead to the development and validation of conceptual/statistical/physical models.

Proceedings Article | 4 September 2001 Paper

Intercomparison of optical turbulence observations in a mountain-valley system

Frank Eaton, Wilbur Brown, Stephen Ford, Judith Miller, Sheldon Stokes, Victor Stone

Proceedings Volume 4376, (2001) https://doi.org/10.1117/12.438173

KEYWORDS: Optical turbulence, Turbulence, Surface plasmons, Sensors, Missiles, Atmospheric propagation, Imaging systems, Climatology, Laser applications, Atmospheric optics

Read Abstract +

Proceedings Article | 4 September 2001 Paper

Correlation of weather parameters with sodar-derived Cn2 profiles

Judith Miller, Frank Eaton, Sheldon Stokes

Proceedings Volume 4376, (2001) https://doi.org/10.1117/12.438170

KEYWORDS: Calibration, Sensors, Atmospheric optics, Atmospheric turbulence, Optical turbulence, Meteorology, Turbulence, Solar radiation, Clouds, Acoustics

Read Abstract +

Proceedings Article | 21 July 2000 Paper

Optical turbulence measurements at a mountain ridge

Frank Eaton, Judith Miller, Sheldon Stokes, Kenneth Underwood

Proceedings Volume 4034, (2000) https://doi.org/10.1117/12.391875

KEYWORDS: Solar radiation, Turbulence, Temperature metrology, Sensors, Optical turbulence, Optical testing, Calibration, Missiles, Refractive index, Wind measurement

Read Abstract +

Proceedings Article | 21 July 2000 Paper

Acoustic sounder system design for measurement of optical turbulence and wind profiles

Judith Miller, Frank Eaton, Sheldon Stokes

Proceedings Volume 4034, (2000) https://doi.org/10.1117/12.391866

KEYWORDS: Acoustics, Signal processing, Turbulence, Optical turbulence, Calibration, Antennas, Signal attenuation, Temperature metrology, Meteorology, Convection

Read Abstract +

Proceedings Article | 21 July 2000 Paper

Optical turbulence measurement and acoustic sounder calibration using hot-wire anemometers

Sheldon Stokes, Frank Eaton, Judith Miller

Proceedings Volume 4034, (2000) https://doi.org/10.1117/12.391858

KEYWORDS: Optical turbulence, Acoustics, Temperature metrology, Calibration, Atmospheric optics, Optical testing, Solar radiation, Refraction, Data modeling, Refractive index

Read Abstract +

Showing 5 of 8 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years