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SIMARD, Y., I. McQUINN, M. MONTMINY, C. LANG, C. STEVENS, F. GOULET, J.-P. LAPIERRE, J.-L. BEAULIEU, J. LANDRY, Y. SAMSON, M. GAGNÉ, 2000. CH2 : Canadian Hydroacoustic data analysis tool 2 user's manual (version 2.0). Can. Tech. Rep. Fish. Aquat. Sci., 2332, 123 p .
CH2 is the acronym for Canadian Hydroacoustic data analysis tool 2. It is a Windows 95 Multiple Document Interface (MDI) C++ application, developed by the Department of Fisheries and Oceans within the framework of the Data Analysis Tools (DAT) project of its National Hydroacoustic Program (NHP). It is dedicated to the display and processing of the standard HAC (Simard et al. 1997) multi-channel (multiple frequencies or beams) multi-echosounder acoustic data produced by the CH1 acquisition and real-time monitoring module (Simard et al. 1998). Data can originate from various analog or digital echosounders (e.g. Biosonics 102 type, Simrad EK500, or EY500). CH2 version 2.0 includes several editing TOOLS, to edit, eliminate, ignore, threshold, filter, or correct the raw HAC data, without erasing any original information. It also incorporates multi-channel classification tools, to partition the acoustic data into echo categories according to user decisions, and multi-channel echointegration capabilities for each echo category. The user can always track the various processing steps that have been applied to the original raw data. CH2 holds full undo and redo facilities for the various operations applied to the raw data. Edited files can be saved under the standard HAC format and contain the raw data plus the parameters of the editing/classification operations. The echointegration data are exported in ASCII text files that are directly usable by common data analysis or visualisation packages such as worksheets, statistical packages, and 2-D and 3-D mapping packages.
GRÉGOIRE, F., Y. SAMSON, J.-L. BEAULIEU, 1999. Résultats du relevé exploratoire d'hydroacoustique au capelan (Mallotus villosus) réalisé sur la côte ouest de Terre-Neuve en 1998. MPO, Secrétariat canadien pour l'évaluation des stocks, Document de recherche ; 99/10, 20 p .
A capelin exploratory acoustic survey was conducted in 1998 on the west coast of Newfoundland. Between June 6 and June 10, 29 transects were completed and schools of fish were detected in each occasion. The schools were characterized by different geometries and those believed to be capelin were located between the thermoclin and the surface. It was not possible to determine the exact composition of these schools by the acquisition of commercial fish samples because the spawn and the fishery, which is directed essentially on mature females, were not started yet at the time of the survey.
SIMARD, Y., I. McQUINN, M. MONTMINY, Y. SAMSON, C. LANG, C. STEVENS, D. MILLER, 1998. CH1, Canadian Hydroacoustic Data Analysis Tool 1, user's manual (version 2.0). Can. Tech. Rep. Fish. Aquat. Sci., 2256, 100 p .
CH1 is the acronym for Canadian Hydroacoustic data analysis tool 1. It is a Windows 95 Multiple Document Interface (MDI) C++ application, developed by the Department of Fisheries and Oceans within the framework of the Data Analysis Tools (DAT) project of its National Hydroacoustic Program (NHP). It is a versatile tool designed to acquire hydroacoustic data produced by analog or, digital multi-channel (multiple frequencies or beams) echosounders under a standard, upgradable, and versatile data format, called HAC format (Simard et al. 1997). Both analog echosounders (e.g. Biosonics 102 types) and digital echosounders (e.g. Simrad EK500 or EY500) are considered by CH1, which is able to acquire data from many echosounders simultaneously. It incorporates variable threshold functions (TVT, Time Varied Threshold) which can adapt to ambient noise. Data from analog echosounders are collected via Bridgenorth Inc. 16-bit A/D converters and a Digital Signal Processor (DSP), coupled to a signal conditioning box to which the analog outputs of the detected echosounder channels are connected. Data from the Simard EK500 digital echosounder are acquired via an Ethernet port. CH1 can configure the EK500 by sending its parameters through a serial port. The NMEA-183 GPS position is read from a serial port. This manual is a guide to the use of CH1. Some of the information presented is also available from the CH1 on-line help. Other tools of the NHP-DAT project are designed to read, display or, translate *.HAC files to or from other formats. These tools are known as CH2 and HAC-trafic.
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