Temperature reconstruction errors caused by representation of a priori information with use empirical ortogonal functions

• Autorzy: Virovlyansky A. L. , Kazarova A. Y. , Lyubavin L. Y. , Stromkov A A.
• Konferencja: 17 th Symposium on Hydroacoustics (23-26.05.2000; Jurata; Polska)
• Języki publikacji: EN

Abstrakty

EN

The restoration of mean temperature of water layer is considered when the expansion of inhomogeneities of temperature field on empirical orthogonal functions (EOF) is used for description of a priori information. In practice only several first EOF giving the basic contribution into average square of a sound speed variation are taken into account. Even small modification of statistical model of inhomogeneities can noticeably change for the worse the quality of restoration of parameters of inhomogeneities. It is shown that the neglect by higher EOF, despite of their rather small contribution, can noticeably increase an error of the restoration of mean temperature of water layer.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2000
• Tom: Vol. 3
• Strony: 105--108
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Virovlyansky A. L.

• Institute of Applied Physics RAS, 46 Ulyanova Str., 603600 Nizhny Novgorod, Russia

autor

Kazarova A. Y.

• Institute of Applied Physics RAS, 46 Ulyanova Str., 603600 Nizhny Novgorod, Russia

autor

Lyubavin L. Y.

• Institute of Applied Physics RAS, 46 Ulyanova Str., 603600 Nizhny Novgorod, Russia

autor

Stromkov A A.

• Institute of Applied Physics RAS, 46 Ulyanova Str., 603600 Nizhny Novgorod, Russia

Bibliografia

• 1 Munk W., Wunsch c., Ocean Acoustic Tomography: a Scheme for Large Scale Monitoring, Deep-SeaRes. A, V.26, 123-161 (1979).
• 2 Virovlyanskii, AL., Kazarova, A.Yu., and Lyubavin, L.Ya., Reconstruction of the Mean Temperature in a Water Layer from the Arrival Times of Quartets of Rays: Accuracy Estimations, Akust. Zh., V.44, No.1, 39-45 (1998) [Acoust. Phys., V.44, No.l, 29-34 (1998)].
• 3 Dushaw B.D., Inversion of multimegamter-range acoustic data for ocean temperature, IEEE Journal of Ocean Engineering, V.24, No.2, 215-223 (1999).
• 4 Skarsoulis E.K., Athanassoulis G.A, Second-order perturbations of peak-arrival times due to sound-speed variations, JASA, V.I04, No.6, 3313 - 3325 (1998).
• 5 Stromkov AA, Virovlyanskii AL., Kazarova AYu., and Lyubavin L.Ya., Measurement of Differences in Signal Travel Times over Rays on Board of Drifting Ship, Akust. Zh., V.45, NoA, 473-478 (1999) [Acoust. Phys., VA5, NoA, 420-425 (1999)].