David Jay Markwald, 72404 12Th St SE, Auburn, WA 98002
David Markwald Phones & Addresses
404 12Th St SE, Auburn, WA 98002 253-3506678
1705 6Th St NE, Auburn, WA 98002
Kent, WA
Kirkland, WA
Kiona, WA
404 12Th St SE, Auburn, WA 98002
Work
Position:
Administrative Support Occupations, Including Clerical Occupations
Education
Degree:
High school graduate or higher
Mentions for David Jay Markwald
Publications & IP owners
Us Patents
Reverberation Backscatter Measurement System
US Patent:
4187488, Feb 5, 1980
Filed:
Mar 20, 1978
Appl. No.:
5/888080
Inventors:
William B. Anderson - Silverdale WA
David B. Markwald - Bremerton WA
David B. Markwald - Bremerton WA
Assignee:
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
G01S 966
US Classification:
367 13
Abstract:
A reverberation backscatter measurement system for providing in situ measment of acoustic backscatter levels from point source scatterers or the target size of individual scatterers within or at the boundaries of the transmitting medium. The volume scattering strength, a calculated value from measured data, is the logarithmic ratio of the reflected intensity to the incident intensity at a unit distance from the acoustic center of the scatterers. The system accurately measures the parameters of volume scattering strength (S) and target strength (TS) and has application in the measurement and determination of sonar system performance and target strengths of vessels and their wakes. It also may be used in fisheries for biological studies in zooplankton population and distribution assessments. A data processing system is also provided to effectively and accurately process reflected signals indicating target strength and scattering strength.
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