| 报告题名: | Power-budget and echo-integrator equations for fish abundance estimation |
| 作者: | Lunde, Per; Pedersen, Audun O.; Korneliussen, Rolf J.; Tichy, Frank E.; Nes, Håvard
|
| 出版者: | Havforskningsinstituttet
|
| 出版年: | 2013
|
| 发表日期: | 2013-12-31
|
| 国家: | 挪威
|
| 语种: | 英语
|
| 英文关键词: | echo sounder
; ekkolodd
; stock assessment
; bestandsberegning
; acoustics
; akustikk
; VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924
|
| 中文主题词: | 渔业
|
| 主题词: | FISHERIES
|
| 英文摘要: | For abundance estimation and species identification on fisheries acoustic surveys, control with temperature and
finite amplitude effects in the sea demands the calibration factor C of the conventional echo-integrator equation
to be fully known in terms of the sonar system’s electrical and acoustical parameters. As no such expression is
available from earlier literature, the theoretical basis for the power budget and echo-integrator equations is
revisited. The objective is to provide (a) a derivation of these equations for integration in a more complete
functional relationship for abundance measurement, including an expression for the calibration factor C; (b) to
account for electrical termination; (c) to formulate these expressions in terms of voltage signal echo integration
processing; and (d) thereby generalize the Clay-Medwin formulations based on echo integration of “in-water”
sound pressure signals, to account for the transducer and electronics components of the echosounder system.
Under conditions of small-amplitude (linear) sound propagation, electroacoustic power budget equations are
derived for the backscattering cross section in single-target backscattering, used in echosounder calibration; and
the volume backscattering coefficient for multiple-target backscattering, used in oceanic surveys. On this basis a
more complete echo-integrator equation is derived for two operational cases, “short-ping-and-long-gate”, and
“long-ping-and-short-gate”. The results are consistent with and extend previous work in this area. |
| URL: | https://brage.bibsys.no/xmlui/bitstream/handle/11250/113867/FoH_10-2013.pdf?sequence=1&isAllowed=y
|
| 资源类型: | 研究报告
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/28476
|
| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
|
| File Name/ File Size |
Content Type |
Version |
Access |
License |
|
|---|
| FoH_10-2013.pdf（1114KB） | 研究报告 | -- | 开放获取 | | View
Download
|
|
| Recommended Citation: | |
Lunde, Per,Pedersen, Audun O.,Korneliussen, Rolf J.,et al. Power-budget and echo-integrator equations for fish abundance estimation. 2013-01-01.
|
|
|