Accession Number:

ADA464656

Title:

Doppler Frequency Shift in Ocean Wave Measurements: Frequency Downshift of a Fixed Spectral Wave Number Component by Advection of Wave Orbital Velocity

Descriptive Note:

Journal article (refereed)

Corporate Author:

NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV

Personal Author(s):

Report Date:

2006-01-01

Pagination or Media Count:

5.0

Abstract:

Because the Jacobian connecting wave number to frequency conversion is nonlinear, in the presence of background waves even without a mean current a wave number spectral component does not appear at he expected intrinsic frequency in the frequency spectrum measured by a stationary probe. The advection of the wave number component by the orbital current of background waves produces a net downshift in the encounter frequency. Comparison with laboratory measurements shows that the effect is important in low-wind conditions. As wind speed increases, the frequency downshift due to orbital advection becomes less recognizable.

Subject Categories:

  • Radiofrequency Wave Propagation
  • Physical and Dynamic Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE