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Record 18 of 12463
A comparison of in situ and airborne radar observations of ocean wave directionality
Author and Affiliation:
Jackson, F. C.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Walton, W. T.(NASA Goddard Space Flight Center, Greenbelt)
Peng, C. Y.(Science Systems and Applications, Inc., Seabrook, MD, United States)
Abstract: The directional spectrum of a fully arisen, about 3 m sea as measured by an experimental airborne radar, the NASA K(u)-band radar ocean wave spectrometer (ROWS), is compared to reference pitch-roll buoy data and to the classical SWOP (stereo wave observations project) spectrum for fully developed conditions. The ROWS spectrum, inferred indirectly from backscattered power measurements at 5-km altitude, is shown to be in excellent agreement with the buoy spectrum. Specifically, excellent agreement is found between the two nondirectional height spectra, and mean wave directions and directional spreads as functions of frequency. A comparison of the ROWS and SWOP spectra shows the two spectra to be very similar, in detailed shape as well as in terms of the gross spreading characteristics. Both spectra are seen to exhibit bimodal structures which accord with the Phillips' (1958) resonance mechanism. This observation is thus seen to support Phillips' contention that the SWOP modes were indeed resonance modes, not statistical artifacts.
Publication Date: Jan 20, 1985
Document ID:
19850038336
(Acquired Nov 28, 1995)
Accession Number: 85A20487
Subject Category: OCEANOGRAPHY
Document Type: Journal Article
Publication Information: Journal of Geophysical Research (ISSN 0148-0227); 90; 1005-101
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Maryland Univ.; College Park, MD, United States
Science Systems and Applications, Inc.; Seabrook, MD, United States
Description: 14p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: AIRBORNE EQUIPMENT; AIRBORNE RADAR; DIRECTION; OCEAN DYNAMICS; RADAR MEASUREMENT; WATER WAVES; BACKSCATTERING; BUOYS; HEIGHT; SPECTROMETERS
Imprint And Other Notes: Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Jan. 20, 1985, p. 1005-1018. NASA-supported research.
Miscellaneous Notes: NASA-supported research
Availability Source: Other Sources
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