QUE SIGNIFIE ECHO SOUNDER EN ANGLAIS
Echo sounding
L'échosité est un type de SONAR utilisé pour déterminer la profondeur de l'eau en transmettant des impulsions sonores dans l'eau. L'intervalle de temps entre l'émission et le retour d'une impulsion est enregistré, ce qui permet de déterminer la profondeur de l'eau avec la vitesse du son dans l'eau à l'heure. Cette information est généralement utilisée à des fins de navigation ou pour obtenir des profondeurs à des fins de cartographie. Le sonorisation d'écho peut également se référer à des "échosondeurs" hydroacoustiques définis comme un son actif dans l'eau utilisée pour étudier les poissons. Les évaluations hydroacoustiques ont traditionnellement employé des enquêtes mobiles auprès de bateaux pour évaluer la biomasse des poissons et les distributions spatiales. À l'inverse, les techniques de localisation fixe utilisent des transducteurs stationnaires pour surveiller les poissons qui passent. Le son du mot est utilisé pour tous les types de mesures de profondeur, y compris celles qui n'utilisent pas le son, et ne correspond pas à l'origine du mot «son» au sens du bruit ou des sons. Le sonorité d'écho est une méthode plus rapide de mesure de la profondeur que la technique précédente d'abaissement d'une ligne de sonorisation jusqu'à ce qu'elle touche le fond.
définition de echo sounder dans le dictionnaire anglais
La définition d'échosondeur dans le dictionnaire est un dispositif de navigation et de localisation qui détermine la profondeur en mesurant le temps nécessaire pour qu'une impulsion de son à haute fréquence atteigne le fond marin ou un objet submergé et pour que l'écho revienne.
MOTS EN ANGLAIS EN RAPPORT AVEC «ECHO SOUNDER»
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10 LIVRES EN ANGLAIS EN RAPPORT AVEC «ECHO SOUNDER»
Découvrez l'usage de
echo sounder dans la sélection bibliographique suivante. Des livres en rapport avec
echo sounder et de courts extraits de ceux-ci pour replacer dans son contexte son utilisation littéraire.
1
Finding Fish with
Echo-sounders
The examples used are drawings which show the boat, the sea bottom and the
fish, so that you can compare them and begin to understand how an echo-
sounder picture is made (Figure 16 is a real echo- sounder picture). In Section 10
, you ...
J. Burczynski, M. Ben-Yami,
1985
2
Manual of Offshore Surveying for Geoscientists and Engineers
The Krupp Atlas Deso 20 sounder has been in use for many years and is
probably the most popular survey echo-sounder. It has two transducers operating
on separate frequencies of 30kHz and 210kHz. The resolution of the higher
frequency ...
3
Whales, Dolphins, and Porpoises
They are aligned, or nearly so, at two times when the click rate of the whale is in
synchrony with the ping rate of the echo sounder. At these times the click rate is
just twice the ping rate. With each sweep of the recorder stylus two whale clicks ...
Kenneth Stafford Norris,
1966
4
Oceanography: An Invitation to Marine Science
As you'll see in Figure 4.4, there is a clever solution to this problem. it: , "l r .1 23 r
Hubert Profeta b An echo sounder trace. A sound pulse from a ship is reflected off
the seabed and returns to the ship. Transit time provides a measure of depth.
5
Second-class Radioelectronic Certificate for Global Maritime ...
It follows from (5.29) and (5.30) that the main task for measuring depth by means
of an echo- sounder is to measure the interval At, which with small depths will be
rather small (with H=10 m. C = 1500 ms "\ At= 0.013 s) An echo-sounder works ...
6
An Introduction to Underwater Acoustics: Principles and ...
Multibeam echo sounder geometrv (Upper) View from above, with the overall
swathe width L and the along-track (longitudinal) aperture 9L. (Lower) Vertical
view, with the across-track transversal beam aperture 6r. and the maximal beam
tilt ...
higher than the threshold value, and thus, it is recorded as a seabed surface. At
the frequencies of 2 1 0 kHz and 455kHz the echo envelope of the signal
reflected from a mud and sand is above the echo sounder threshold, and thus,
the ...
8
Continental Shelf Limits : The Scientific and Legal ...
In 1904, the first global set of such charts was published by GEBCO. Despite
some ingenious attempts to find other methods of measuring depth, the weighted
line remained the fundamental method until the development of the echo
sounder ...
Peter J. Cook, Chris M. Carleton,
2000
9
Geology And Stratigraphy of the Antarctic Margin Volume 71
Expeditions (ANARE) in 1982. It acquired multichannel seismic reflection and 3.5
kHz echo sounder data which is the main data set used in this study [Stagg, 1985
]. Russian and Japanese expeditions have also obtained multichannel seismic ...
10
Contributions to the Mesolithic in Europe: Papers Presented ...
In submarine situations the situation is different, because the soft sediments will
be saturated by water which is a very good sound transmitter. In 1985 I became
aware of Tjeerd van Andels work with sediment echo sounder for reconstruction
of ...
P. M. Vermeersch, Philip van Peer,
1990
10 ACTUALITÉS CONTENANT LE TERME «ECHO SOUNDER»
Découvrez de quoi on parle dans les médias nationaux et internationaux et comment le terme
echo sounder est employé dans le contexte des actualités suivantes.
Plenty of talk about piracy but too little action to curb it
... echo sounder and EPIRB (Emergency Positioning Indicating Beacon) and fully equipped with safety and emergency equipment was bought ... «Stabroek News, juil 15»
MH370: More ships should be used for search, say aviation experts
The current deep-sea autonomous vehicle is using multi-beam echo sounder ... "Using data collected from a multi-beam echo sounder and a ... «Astro Awani, juil 15»
Families of missing CG crew search mangrove forests
Also, an NIOT research vessel Sagar Nidhi and later Reliance Industries' "Olympic Canyon" vessel equipped with echo sounder and a remotely ... «Zee News, juin 15»
MMT secures ABB prelay/UXO survey deal
The offshore geophysical survey will be performed with a hull-mounted multibeam echo sounder and a ROTV. For the UXO survey MMT are ... «Offshore Shipping Online, juin 15»
Island's rise and fall points to next mega-earthquake
Wesson and colleagues returned to Isla Santa Maria in 2010, undertaking modern echo sounder surveys and GPS measurements, which show ... «ABC Science Online, juin 15»
Missing Dornier: Reliance's vessel joins search for Coast Guard plane
“Olympic Canyon is equipped with Echo Sounder and remotely operated underwater camera with projector lights which enable it to conduct ... «The Indian Express, juin 15»
Reliance`s Vessel Joins Search for Missing Dornier | Chennai …
"Olympic Canyon is equipped with Echo Sounder and remotely operated underwater camera with projector lights which enable it to conduct ... «NYOOOZ, juin 15»
Kongsberg Maritime: Portuguese survey company gets to grips with …
... the next generation software for Kongsberg Maritime's GeoSwath Plus shallow water multibeam echo sounder has already been put through ... «Hellenic Shipping News Worldwide, juin 15»
The hydrographer's trousers
... sometimes sitting in open boats with an outboard motor and an echo sounder, checking whether it was safe to bring the ships alongside the ... «Sydney Morning Herald, juin 15»
MMT initials ABB survey deal
The offshore geophysical survey will be performed with a hull-mounted multibeam echo sounder and a ROTV. MMT are using a transverse ... «reNews, juin 15»