Comparison of Theoretical Predictions with Field Observations for a Simple Forward Scattering Sensor.

Abstract

Field measurements with a simple 660 nm forward scattering sensor were analysed by means of a three-layered sphere model of light scattering. The scattering sensor measures a value that represents the scattering function multiplied by a weighting function The geometry of the scattering sensor determines the weighting function. A model was developed that determines the weighting function based on sensor geometry. For the sensor tested the weighting function peaks at 27 degrees with a FWHM of 22 degrees. Measurements with the device were made off the Oregon coast and off San Diego. The device tested displayed segmented linear relationships with the particulate beam attenuation coefficient at 660% and the particulate total scattering coefficient at 488 nm as a function of depth. The slope of the correlation with the particulate beam attenuation coefficient changed by a factor of five over a depth range of 125 meters.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 04, 1994
Accession Number
ADA294948

Entities

People

  • J. R. Zaneveld
  • James C. Kitchen

Organizations

  • Oregon State University

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Absorption
  • Attenuation
  • Coefficients
  • Detectors
  • Forward Scattering
  • Geometry
  • Measurement
  • Observation
  • Oceanography
  • Optical Properties
  • Particle Size
  • Particles
  • Refraction
  • Refractive Index
  • Scattering
  • Surface Waters
  • Weighting Functions

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Regression Analysis.
  • Spectroscopy.