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Record W2189374665

HF Sonar Performance in Whitecaps and Wakes

2015· article· en· W2189374665 on OpenAlexvenueno aff
Mark V. Trevorrow, Svein Vagle

Bibliographic record

VenueCanadian acoustics · 2015
Typearticle
Languageen
FieldEngineering
TopicMaritime Navigation and Safety
Canadian institutionsnot available
Fundersnot available
KeywordsSonarSea trialMarine engineeringMarine mammals and sonarSternGeologyRemote sensingRange (aeronautics)WakeAcousticsMeteorologyEnvironmental scienceOceanographyEngineeringAerospace engineeringGeographyPhysics
DOInot available

Abstract

fetched live from OpenAlex

A HF sonar performance sea-trial was conducted on the CCGS VECTOR April 8 to 14, 2015 in BC south coast waters. This sea-trial was focused on assessing the limitations to horizontally-oriented HF sonar performance posed by naturally-occurring (e.g. due to white-capping) and ship-wake bubbles. A 90kHz multibeam sonar was operated from the ship against both drifting and towed targets. Forward-looking sonar detection tests were conducted in Sea States from 0 to 5. In low sea-states the drifting targets were routinely observed at ranges up to 550m, but the detection range was significantly reduced under higher sea-states. The aft-looking sonar tests, designed to test target detectability in the ship wake, utilized a towed target at distances from 50m to 500m behind the ship at speeds from 5 to 7knots. Generally the towed target was visible at all ranges except in the close vicinity (<40m) of the stern.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: Simulation or modeling
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.349
Threshold uncertainty score0.620

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.012
GPT teacher head0.176
Teacher spread0.165 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designSimulation or modeling
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2015
Admission routes1
Has abstractyes

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