12 Days Under Ice – an historic AUV deployment in the Canadian High Arctic
Notice bibliographique
Résumé
In March and April 2010, an International Submarine Engineering (ISE) Explorer Autonomous Underwater Vehicle (AUV), built for Natural Resources Canada (NRCan), was deployed to Canada’s High Arctic. Its mission was to undertake under-ice bathymetric surveys in support of Canada’s United Nations Convention on the Law of the Sea (UNCLOS) Outer Continental Shelf claim. During this deployment several underice records were broken and several new technologies were demonstrated. This achievement was in part the result of the development work that ISE and Defence Research and Development Canada (DRDC) undertook from 1993 to 1996 on the Theseus AUV during the Spinnaker program. During this program Theseus successfully completed two 200 km under-ice missions from CFS Alert on Ellesmere Island. NRCan’s AUV is an ISE Explorer class vehicle, with several innovative additions to make it suitable for Arctic survey work. Most notable are a 4000 m depth rated variable ballast system, a 1500 Hz long range homing system, and under ice charging and data transfer capabilities. A Short Range Localization (SRL) system was also developed for close range positioning. The homing and SRL systems were developed by Canadian defense scientists and engineers at DRDC. The Explorer’s range was extended to approximately 400 km by adding an additional hull section to accommodate extra batteries. The Main Camp near Borden Island (78°13.50’N, 112°38.87’W) was the launch site for the AUV. It was launched from an 8 m by 2.5 m ice-hole, cut through 2 – 3 m of thick ice. After several test dives its first mission was a transit to a Remote Camp, over 300 km to the northwest. The AUV autonomously homed into the Remote Camp and was successfully docked at the ice-hole where, without being removed from the water, it was charged and survey data was downloaded, all through a 1.5 m square ice hole. Subsequently, a second survey mission greater than 300 km in round trip length was undertaken, after which the AUV returned back to the Remote Camp. Finally, the vehicle embarked on a return mission to the Main Camp for recovery. From beginning to end, the AUV spent nearly 12 days under the ice before being successfully recovered. In total, close to 1000 km of under ice survey was accomplished between the AUV launch, Remote Camp mission, and recovery. The AUV reached depths of 3160 m and transited at an average speed of 1.5 m/s at an altitude of 130 m off the seabed. ISE and DRDC are now preparing for a 2011 deployment to collect additional data UNCLOS data. Aspects of the pre-deployment that will be presented include fail-safe provisions, mission planning, risk assessment, and mission logistics. Operational aspects to be discussed will include dealing with AUV operations in the extreme cold, initialization of the inertial navigation system, under-ice acoustics, acoustic homing to the recovery site and the procedures for recovery.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,001 | 0,001 |
| Études des sciences et des technologies | 0,005 | 0,001 |
| Communication savante | 0,001 | 0,000 |
| Science ouverte | 0,001 | 0,001 |
| Intégrité de la recherche | 0,001 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,002 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».