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Skildring:The measured calibration gain for a transducer should be identical for different calibration spheres, but this example shows gaps in the gain, in particular located close to the deep minima of the spheres.
Kode: HAV-67256
Kreditering: Tonje Nesse Forland / Havforskningsinstituttet
Søkeord: Calibration, CRIMAC, EK80, FM, Frequency Modulated, xxxInExternalxxx
AI-søkeord: akustisk kalibrering, kalibreringskuleir, frekvensområde 170–260 kHz, forsterking vs frekvens, MATLAB-graf, punktdiagram, vitskapleg datavisualisering, WC25, WC35, WC38.1
AI-tekster: Why do we get different gain for different calibration spheres?, 29.5, Gain with WC25, 29, Gain with WC35, Gain with WC38.1, 28.5, 28, 27.5, gain, 27, 26.5, 26, 25.5, 25, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, frequency, kHz, Why, do, we, get, different, gain, for, different, calibration, spheres?, 29.5, Gain, with, WC25, 29, Gain, with, WC35, Gain, with, WC38.1, 28.5, 28, 27.5, gain, 27, 26.5, 26, 25.5, 25, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, frequency,, kHz
Alternativ tekst: Spreiingsplott som samanliknar sonarvinstverdi på tvers av frekvensane 170–260 kHz for tre wolframkarbid-kalibreringskuleir: WC25, WC35, WC38.1.
Filtypar: Original (2560 x 1323), Medium(JPG) (1920 x 992), Liten(JPG) (1080 x 558)

HAV-67256
The measured calibration gain for a transducer should be identical for different calibration spheres, but this example shows gaps in the gain, in particular located close to the deep minima of the spheres.
Tonje Nesse Forland / Havforskningsinstituttet
Original (2560 x 1323)
Medium(JPG) (1920 x 992)
Liten(JPG) (1080 x 558)

Skildring:Egil Ona in full on research and student education mode on his last week before retirement. CRIMAC project activity on improving methods for broadband echo-sounder calibration. TS-Probe is used at Nykirkekaien 1 key side.
År: 2021
Kode: HAV-25006
Kreditering: Rokas Kubilius / Havforskningsinstituttet
Søkeord: CRIMAC, TS-Probe, Echosounder, Broadband, Calibration, Calibration sphere, xxxInExternalxxx
Kategoriar: Materiell, Utstyr og reiskapar
AI-søkeord: kalibreringskuleir, skumpolstring, maritim utstyr, metallkuler, opne saker, Pelican-kasser, vitskapleg utstyr, sonarutstyr, lagringsorganisering, gule etuiar
AI-tekster: AC, -, ROKAS, AC, -, ROKAS, CALIBRATION, Wash, and, dry, after
Alternativ tekst: Gule Pelican-koffertar opne på eit bord, som inneheld kalibreringskular og vitskapleg utstyr merkt WBAT BOX.
Filtypar: Original (4032 x 2268), Medium(JPG) (1920 x 1080), Liten(JPG) (1080 x 608)

HAV-25006
Egil Ona in full on research and student education mode on his last week before retirement. CRIMAC project activity on improving methods for broadband echo-sounder calibration. TS-Probe is used at Nykirkekaien 1 key side.
Rokas Kubilius / Havforskningsinstituttet
Original (4032 x 2268)
Medium(JPG) (1920 x 1080)
Liten(JPG) (1080 x 608)