Cristin-resultat-ID: 1941537
Sist endret: 30. september 2021, 15:03
Resultat
Vitenskapelig foredrag
2021

Echo sounder developments during my scientific life, - from EK38 to EK80, some significant steps

Bidragsytere:
  • Egil Ona

Presentasjon

Navn på arrangementet: ICES WGFAST and ICES-FAO WGFTFB
Sted: Bergen
Dato fra: 19. april 2021
Dato til: 23. april 2121

Arrangør:

Arrangørnavn: ICES

Om resultatet

Vitenskapelig foredrag
Publiseringsår: 2021

Beskrivelse Beskrivelse

Tittel

Echo sounder developments during my scientific life, - from EK38 to EK80, some significant steps

Sammendrag

Over the last 42 years, I have used eight generations of echo scientific sounders, outside the ones I used in fishing, before I became a scientist. It has been a great journey, and I will try, mainly for the younger members, to summarize some of the significant steps in this development and end my talk with gazing into the crustal ball. I will start in 1934/35, but swiftly run to the first echo sounders I used at IMR, a EK38 kHz sounder with no TVG, removed from the vessels, but used experimentally. I will further show some of the problems with using these systems but also the first scientific echo sounder with TVG, tried and installed in 1968 on G.O.Sars, the EK38-S. The echo integrator and the need for calibration became obvious, and how it was solved. The EK400, and the ES380, with split beam needs some attention, and further to the fully digital word in EK500, EK60 and EK80, each with gradual, stepwise improvements, replay facilities and on-screen interpretation and multifrequency facilities. At last, I will talk a bit about the new broad band systems and what we have seen they can add to our knowledge.

Bidragsytere

Egil Ona

  • Tilknyttet:
    Forfatter
    ved Økosystemakustikk ved Havforskningsinstituttet
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