This work is sponsored by the Office of Naval Research through Naval Research Laboratory’s research project “Phase-resolved nonlinear transformation of shoaling waves” (Program Element 62435N) and NASA’s Mission to Planet Earth. We express our appreciation of the flight crew and the engineers and technicians who successfully executed the field experiment. The in situ wind and wave data were supplied by the Field Research Facility, U.S. Army Corps of Engineers, and the National Data Buoy Center, National Oceanographic and Atmospheric Administration.
Benoit, M., P. Frigaard, and H. A. Schaffer, 1997: Analyzing multidirectional wave spectra: A tentative classification of available methods. Proc. Seminar on Multidirectional Waves and their Interaction with Structures, San Francisco, CA, International Assembly of Hydraulic Research, 131–158.
Cote, L. J., and Coauthors, 1960: The directional spectrum of a wind generated sea as determined from data obtained by the Stereo Wave Observation Project. Meteorological Papers, Vol. 2, University Publishers Tech. Rep., New York University, 88 pp.
Donelan, M. A., J. Hamilton, and W. H. Hui, 1985: Directional spectra of wind-generated waves. Philos. Trans. Roy. Soc. London,A315, 509–562.
Earle, M. D., 1996: Nondirectional and directional wave data analysis procedures. NDBC Tech. Doc. 96-01, 37 pp. [Available from NDBC, Stennis Space Center, MS 39529.].
Ewans, K. C., 1998: Observations of the directional spectrum of fetch-limited waves. J. Phys. Oceanogr.,28, 495–512.
Hasselmann, D. E., M. Dunckel, and J. A. Ewing, 1980: Directional wave spectra observed during JONSWAP 1973. J. Phys. Oceanogr.,10, 1264–1280.
Hasselmann, K., 1974: On the spectral dissipation of ocean waves due to whitecapping. Bound.-Layer Meteor.,6, 107–127.
Holthuijsen, L. H., 1983: Observations of the directional distribution of ocean-wave energy in fetch-limited conditions. J. Phys. Oceanogr.,13, 191–207.
Hwang, P. A., E. J. Walsh, W. B. Krabill, R. N. Swift, S. S. Manizade, J. F. Scott, and M. D. Earle, 1998: Airborne remote sensing applications to coastal wave research. J. Geophys. Res.,103, 18 791–18 800.
——, D. W. Wang, E. J. Walsh, W. B. Krabill, and R. N. Swift, 2000:Airborne measurements of the wavenumber spectra of ocean surface waves. Part I. Spectral slope and dimensionless spectral coefficient. J. Phys. Oceanogr.,30, 2753–2767.
Jackson, F. C., W. T. Walton, and C. Y. Peng, 1985: A comparison of in situ and airborne radar observations of ocean wave directionality. J. Geophys. Res.,90, 1005–1018.
Komen, G. J., S. Hasselmann, and K. Hasselmann, 1984: On the existence of a fully developed wind-sea spectrum. J. Phys. Oceanogr.,14, 1271–1285.
Krabill, W. B., R. H. Thomas, K. Jezek, C. Kuivinen, and S. Manizade, 1995a: Greenland ice sheet thickness changes measured by laser altimetry. Geophys. Res. Lett.,22, 2341–2344.
——, ——, C. F. Martin, R. N. Swift, and E. B. Frederick, 1995b: Accuracy of airborne laser altimetry over the Greenland ice sheet. Int. J. Remote Sens.,16, 1211–1222.
Longuet-Higgins, M. S., D. E. Cartwright, and N. D. Smith, 1963: Observations of the directional spectrum of sea waves using the motions of a floating buoy. Ocean Wave Spectra, Prentice Hall, 111–136.
Lygre, A., and H. E. Krogstad, 1986: Maximum entropy estimation of the directional distribution in ocean wave spectra. J. Phys. Oceanogr.,16, 2052–2060.
Mitsuyasu, H., and Coauthors, 1975: Observation of the directional wave spectra of ocean waves using a cloverleaf buoy. J. Phys. Oceanogr.,5, 750–760.
Oltman-Shay, J., and R. T. Guza, 1984: A data-adaptive ocean wave directional spectrum estimator for pitch–roll type measurements. J. Phys. Oceanogr.,14, 1800–1810.
Phillips, O. M., 1958: On some properties of the spectrum of wind-generated ocean waves. J. Mar. Res.,16, 231–240.
——, 1985: Spectral and statistical properties of the equilibrium range in wind-generated gravity waves. J. Fluid Mech.,156, 505–531.
Wyatt, L. R., 1995: The effect of fetch on the directional spectrum of Celtic Sea storm waves. J. Phys. Oceanogr.,25, 1550–1559.
Young, I. R., 1994: On the measurement of directional wave spectra. Appl. Ocean Res.,16, 283–294.
——, and G. Ph. Van Vledder, 1993: A review of the central role of nonlinear interactions in wind-wave evolution. Philos. Trans. Roy. Soc. London,A342, 505–524.
——, L. A. Verhagen, and M. L. Banner, 1995: A note on the bimodal directional spreading of fetch-limited wind waves. J. Geophys. Res.,100, 773–778.