janus configuration in doppler log

janus configuration in doppler log

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Doppler Log Janus Configuration - Marine Teacher

    https://www.marineteacher.com/post/doppler-log-janus-configuration
    Doppler Log Janus Configuration Doppler Log general formula with only one transducer- A transducer is fitted on the ship’s keel which transmits a beam of acoustic wave at an angle c usually 60° to the keel in the forward direction, this gives the component “ v cos 𝜶” of the ship’s velocity towards the sea bed thus causing the Doppler shift and the
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    https://www.marineteacher.com/post/doppler-log-janus-configuration

What is Janus Configuration? | MarineGyaan

    https://marinegyaan.com/what-is-janus-configuration/
    What is Janus Configuration? Most Doppler logs have Janus Configuration where Transducers pointing ahead measures speed. Transducer pointing Astern is used for accuracy check. Transducers point abeam to measure athwart ship speed (while berthing). Use of Doppler logs for measuring athwartship speed has become mandatory on large tankers.
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    https://marinegyaan.com/what-is-janus-configuration/

Doppler Log on Ships - Oways Online

    https://owaysonline.com/doppler-log-on-ships/
    The transducer assembly used for this type of transmission is called a ‘Janus’ configuration after the Roman god who reputedly possessed two faces and was able to see into both the future and the past. After installing transducer facing aft, the Doppler frequency shift formula now becomes:- Fr t – fr a – 4 vf t cos a / c
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    https://owaysonline.com/doppler-log-on-ships/

Doppler Log - Knowledge Of Sea

    https://knowledgeofsea.com/doppler-log/
    Doppler log on ground track mode can provide atwart ship speed as well and for this purpose a similar Janus configuration is used on the port and starboard sides. The athwart ship speed is calculated in the similar manner as the forward and aft speed. Factors affecting accuracy of Doppler log Heaving
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    https://knowledgeofsea.com/doppler-log/

Doppler Log - Principle, Working, Speed and Errors - Cult of Sea

    https://cultofsea.com/bridge-equipment/1229/
    The principle of Doppler Speed Log & the Janus configuration of the transducer Speed over ground & Speed over water Generally, Doppler log can receive echoes from seabed only up to depths of 200 meters or so. However, beyond these depths, a weaker echo is available from a layer between 10 to 30 metres below the keel.
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    https://cultofsea.com/bridge-equipment/1229/

What is a Janus configuration? - JanetPanic.com

    https://janetpanic.com/what-is-a-janus-configuration/
    What is Janus configuration in speed log? — (ja' n∂s) An arrangement of transducers aimed in opposite directions, as a forward-aft (or port-starboard) pair ...
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Here is All You Need to Know About Doppler Log - MySeaTime

    https://www.myseatime.com/blog/detail/here-is-all-you-need-to-know-about-doppler-log
    Doppler is able to calculate this speed because of Janus configuration. 2. Error due to reflections from the air bubbles For the Doppler log to work accurately, the reflected beam need to be the one that Doppler log thinks it is. If there are false reflections, Doppler log will show wrong readings.
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    https://www.myseatime.com/blog/detail/here-is-all-you-need-to-know-about-doppler-log

JANNUS CONFIGURATION – IMU NOTES

    https://imunotes.in/tag/jannus-configuration/
    JANNUS CONFIGURATION – Most logs have transducers to measure both fore and aft speeds (ahead and stern) as well as athwarthship transducers to measure speed in the sideways direction (Useful when berthing). Such a transducer which measures both alongship as well as athwartship speed is called JANNUS CONFIGURATION.
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    https://imunotes.in/tag/jannus-configuration/

What is janus configuration.pptx - Course Hero

    https://www.coursehero.com/file/57808933/What-is-janus-configurationpptx/
    The placing of the Janus configuration in a fore and aft direction is known as a single axis system and is used to calculate speed over ground in the forward ...
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Velocity correction of the Janus configuration laser Doppler ...

    https://www.sciencedirect.com/science/article/pii/S0263224112004010
    by X Nie · 2013 · Cited by 6 — The LDV system producing forward and backward beams is called a Janus configuration LDV. Janus configuration has been employed in acoustic Doppler logs ...
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    https://www.sciencedirect.com/science/article/pii/S0263224112004010

janus configuration – Knowledge Of Sea

    https://knowledgeofsea.com/tag/janus-configuration/
    janus configuration – Knowledge Of Sea Tag Archives: janus configuration Doppler Log The speed log is a device used to measure the speed and also the number of nautical miles the vessel has travelled through the water in a given time. Type of speed measurements This is the speed of the vessel with respect to the solid Bridge Equipments
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    https://knowledgeofsea.com/tag/janus-configuration/

Janus Antenna Array Design for Doppler Navigation System ...

    https://link.springer.com/chapter/10.1007/978-981-16-5529-6_18
    This paper has successfully developed the JANUS antenna configuration in navigation systems for real-time applications such as airborne vehicles and ships. Doppler shift in the frequency of the received signal and differential magnitude provides valuable data for determining the status of the vehicle in air as well as for landing.
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    https://link.springer.com/chapter/10.1007/978-981-16-5529-6_18

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