Index and Bulk Parameters for Frequency-Direction Spectra Measured at CERC Field Research Facility, September 1987 to August 1988.
Abstract
The directional distribution of wind-wave energy is an intuitively and demonstrably important aspect of sea state definition in coastal engineering design. A multiyear series of measurements has been undertaken. Cross spectra of surface corrected signals from a linear array of nine bottom mounted pressure sensors have been used in conjunction with an iterative maximum likelihood algorithm to estimate frequency direction spectra. The array was located in about 8 m of water, approximately 900 m offshore. This report provides an index of and describes a means of access to 636 frequency direction spectral observations obtained nominally from September 1987 to August 1988. This period represents the second year of data collection. Actual data are reported only until early January 1988. Damage to the array by fishing trawlers precluded successfully data collection for the remainder of this collection year. In addition to a list of data collection start times are a set of bulk parameters that can be used to characterize the observations. These parameters include characteristic wave height, spectral peak frequency and corresponding peak period, peak wave direction, and directional spread. Time series graphs of these parameters as well as local winds and currents illustrate some of the salient climatology. Observed spectra have been archived on magnetic tape and can be provided to a user on request. This report describes the structure, format, and naming scheme of the data files and lists a FORTRAN program that can be used to read them.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1991
- Accession Number
- ADA240320
Entities
People
- Charles E. Long
Organizations
- Coastal Engineering Research Center