1
John L Spiesberger: Ocean acoustic tomography. Woods Hole Oceanographic Institution, Norman E Brunell, November 25, 1997: US05691957 (50 worldwide citation)

An acoustic tomography telemetry system and method allowing spatially averaged ocean temperatures to be measured in real-time. The system includes autonomous acoustic sources mounted on subsurface moorings and receivers that are either suspended from drifting surface buoys or cabled to shore. The te ...


2
Shin ichi Ishii, Gentaroh Kai, Toshiaki Hara, Iwao Nakano: Data transmission method for ocean acoustic tomography. Japan Marine Science & Technology Center, February 14, 1989: US04805160 (26 worldwide citation)

The present invention enables tomography data in the sea to be collected and transmitted via an artificial satellite to a ground station. Accordingly, data on the Doppler phenomenon and shift of a sound wave is also obtainable based on the temperature and density of sea water and an ocean current. T ...


3
Shin Ichi Ishii, Gentaroh Kai, Toshiaki Hara, Iwao Nakano: Data transmission method for ocean acoustic tomography.. Japan Marine Science & Tech, March 16, 1988: EP0260078-A2 (1 worldwide citation)

A data transmission method for ocean acoustic tomography, comprising pluralities of acoustic transducers (1) and transmitter-receivers (2) arranged in two files at a certain distance, characterized in that ocean acoustic tomography data signals obtained between the acoustic transducers (1) and the t ...


4
Araya Tomio: Ocean acoustic tomography-data processing and display device. Oki Electric, October 24, 2000: JP2000-298069 (1 worldwide citation)

PROBLEM TO BE SOLVED: To obtain an ocean acoustic tomography-data processing and display device by which the structure of the ocean from the surface of the sea down to the bottom of the sea can be displayed with high accuracy by a method wherein satellite estimated water-temperature profile data and ...


5
Araya Tomio: Ocean acoustic tomography data-analyzing device. Oki Electric, February 23, 2001: JP2001-050809 (1 worldwide citation)

PROBLEM TO BE SOLVED: To generate a sound speed profile while putting much emphasis on the change in thermocline at a sea area where the subtropical water system is mixed with the subarctic area by providing an operation part or the like for calculating the sound speed profile in a target sea area. ...


6
Hisashi Shiba: Environment measurement system and environment measurement method. NEC CORPORATION, July 11, 2017: US09702973

An environment measurement system according to the present invention is provided with a first unit comprising: a transmitter which is located undersea and transmits an acoustic wave in a designated direction a plurality of times; a first receiver which is located undersea and receives an acoustic wa ...


7
Ito Takao, Kamoshita Takashi: Development function generation method and apparatus for ocean acoustic tomography. Oki Electric, March 6, 1998: JP1998-062543

PROBLEM TO BE SOLVED: To generate an empirical orthogonal function with limited errors. SOLUTION: When a statistic data D11 and an observation data D12 are iniputted, a depth range of the data used for the conversion of sound velocity is limited by a depth range limiting means 21. A sound velocity p ...


8
Ito Takao: Ocean acoustic tomography data analyzer. Oki Electric, March 6, 1998: JP1998-062542

PROBLEM TO BE SOLVED: To obtain an ocean acoustic tomography data analyzer in which inverse problem analysis can be performed even when any one of spline function, triangular function or Gaussian function is selected as a horizontal development function by dividing an objective pection for functiona ...


9
Ito Takao: Sound velocity covariance matrix generator. Oki Electric, March 6, 1998: JP1998-062541

PROBLEM TO BE SOLVED: To enhance quality in the estimation of distribution of two-dimensional sound velocity variation by estimating the spatial distribution of sound velocity variation using a model where a section in the vertical direction is a single section of minimum width sandwiching the passa ...


10
Ito Takao, Kamoshita Takashi: Expansion function generator. Oki Electric, October 1, 1996: JP1996-255074

PURPOSE: To improve estimation precision when an area is divided into sections and estimation is performed by ocean acoustic tomography. CONSTITUTION: A rectangular function generator 11 to which a section board is inputted finds a rectangular function F(0) corresponding to a section and a variation ...



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