ECHOANN: An analyzer for echosounder signals

Poul Degnbol, Torben Filt Jensen, Bo Lundgren, Morten Vinther

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch


ECHOANN is an instrument for collection, analysis and storage of data from hydroacoustic instruments and navigational information. The instrument can be operated on several levels of complexity, integrating information from several data sources or as a portable system collecting information from just a single echo sounder. The analysis and storage includes counting and integration. Schools are identified and integrated separately. Integration results are stored as distributions over signal level. Single fish echoes are stored with TS estimates when split beam information is available. The data stored by the system enables analysis of the shape and parameters of the echo amplitude distribution by depth as needed for evaluation of the degree of single echo overlaps and for isolating the echo integral of larger targets in an environment of small scatterers. The instrument is PC based, but includes separate hardware for signal preprocessing and parallel processing. The system is designed as a "white box" open to user modifications as software is written in high level languages and modular.
Original languageEnglish
Title of host publicationICES CM 1990
Number of pages21
Place of PublicationCopenhagen
PublisherInternational Council for the Exploration of the Sea
Publication date1990
Publication statusPublished - 1990
EventICES Council Meeting 1990 - Copenhagen, Denmark
Duration: 3 Oct 1990 → …


ConferenceICES Council Meeting 1990
Period03/10/1990 → …


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