ENERGY LOSS IN SURFACE WAVE SPECTRA DUE TO DATA WINDOWING
Windowing or tapering of surface-wave time-series is often performed prior to spectral analysis. The loss of variance due to the windowing is theoretically a factor of 8/3 (for cosine windows), but this factor may vary in practice due to the non-white nature of wave spectra. A numerical experiment on 101 wave spectra has shown that although 8/3 is a good correction factor in the mean, corrections on individual records may vary from less than 2 to almost 4.3. Since rarely in geophysical studies are sufficient records available to allow one to approach some theoretical value in the mean, i.e. 8/3, correction of individual records is recommended.
- NATO furnished.
SACLANT ASW Research CentreLa Spezia, Italy
- Briscoe, M G
- Publication Date: 1972-5-1
- Pagination: 13 p.
- TRT Terms: Electromagnetic spectrum; Ocean waves; Stochastic processes; Technology; Wave measurement
- Subject Areas: Data and Information Technology; Design; Marine Transportation;
- Accession Number: 00035585
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: SACLANTCEN-TM-177 Tech memo
- Files: TRIS
- Created Date: Oct 27 1972 12:00AM