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Purser, Autun; Hehemann, Laura; Dreutter, Simon; Dorschel, Boris; Nordhausen, Axel (2020): OFOBS Seafloor images from the Antarctic Peninsula and Powell Basin, collected during RV POLARSTERN cruise PS118 [dataset publication series]. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.911904

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Published: 2020-02-10 • DOI registered: 2020-03-26

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Abstract:
During the RV POLARSTERN cruise to the Antarctic Peninsula and Powell Basin during Feb - April 2019 the Ocean Floor Observation and Bathymetry System (OFOBS) was used to collect still and video images, as well as sidescan data, from various locations surveyed during the research cruise.
The OFOBS system consisted of a towed underwater camera system equipped with both a high-resolution photo-camera (iSiTEC, CANON EOS 5D Mark III) and a high-definition video-camera (iSiTEC, Sony FCB-H11) as well as an integrated sidescan sonar system. The cameras were mounted on a steel frame (140L x 92W x 135H cm), together with two strobe lights (iSiTEC UW-Blitz 250, TTL driven), three laser pointers spaced with a distance of 50 cm used to estimate the size of seafloor structures, four LED lights, and a USBL positioning system (Posidonia) to track the position of the OFOBS during deployments, with additional positioning information provided by the integrated INS and DVL systems.
In automatic mode, a seabed photo, depicting an area of approximately 4 m**2, with variations depending on the actual height above ground, was taken every ~15 seconds to obtain series of "TIMER" stills distributed at regular distances along each of the survey profiles. Profile lengths varied in length depending on duration of the cast, usually determined by the current ice and sea state conditions at time of survey. At a ship speed of 0.5 kn, the average distance between seabed images was approximately 5 m. Ship speed was however greatly influenced by ice conditions. Additional "HOTKEY" photos were taken from interesting objects (organisms, seabed features, etc) when they appeared in the live video feed.
Keyword(s):
Antarctica; Antarctic Peninsula; Corals; OFOBS; OFOS; Seafloor images; Sponges
Coverage:
Median Latitude: -63.076862 * Median Longitude: -54.259915 * South-bound Latitude: -64.939624 * West-bound Longitude: -57.826500 * North-bound Latitude: -60.887241 * East-bound Longitude: -48.896518
Date/Time Start: 2019-03-06T04:59:49 * Date/Time End: 2019-04-04T08:40:56
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
11 datasets

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Datasets listed in this publication series

  1. Purser, A; Hehemann, L; Dreutter, S et al. (2020): Seabed photographs taken along OFOBS profile PS118_6-9 during RV POLARSTERN cruise PS118. https://doi.org/10.1594/PANGAEA.911902
  2. Purser, A; Hehemann, L; Dreutter, S et al. (2020): Seabed photographs taken along OFOBS profile PS118_7-1 during RV POLARSTERN cruise PS118. https://doi.org/10.1594/PANGAEA.911903
  3. Purser, A; Hehemann, L; Dreutter, S et al. (2020): Seabed photographs taken along OFOBS profile PS118_8-1 during RV POLARSTERN cruise PS118. https://doi.org/10.1594/PANGAEA.911911
  4. Purser, A; Hehemann, L; Dreutter, S et al. (2020): Seabed photographs taken along OFOBS profile PS118_9-1 during RV POLARSTERN cruise PS118. https://doi.org/10.1594/PANGAEA.918926
  5. Purser, A; Hehemann, L; Dreutter, S et al. (2020): Seabed photographs taken along OFOBS profile PS118_11-2 during RV POLARSTERN cruise PS118. https://doi.org/10.1594/PANGAEA.911910
  6. Purser, A; Hehemann, L; Dreutter, S et al. (2020): Seabed photographs taken along OFOBS profile PS118_12-12 during RV POLARSTERN cruise PS118. https://doi.org/10.1594/PANGAEA.918925
  7. Purser, A; Hehemann, L; Dreutter, S et al. (2020): Seabed photographs taken along OFOBS profile PS118_38-13 during RV POLARSTERN cruise PS118. https://doi.org/10.1594/PANGAEA.911912
  8. Purser, A; Hehemann, L; Dreutter, S et al. (2020): Seabed photographs taken along OFOBS profile PS118_39-1 during RV POLARSTERN cruise PS118. https://doi.org/10.1594/PANGAEA.911914
  9. Purser, A; Hehemann, L; Dreutter, S et al. (2020): Seabed photographs taken along OFOBS profile PS118_69-1 during RV POLARSTERN cruise PS118. https://doi.org/10.1594/PANGAEA.918924
  10. Purser, A; Hehemann, L; Dreutter, S et al. (2020): Seabed photographs taken along OFOBS profile PS118_77-1 during RV POLARSTERN cruise PS118. https://doi.org/10.1594/PANGAEA.911915
  11. Purser, A; Hehemann, L; Dreutter, S et al. (2020): Seabed photographs taken along OFOBS profile PS118_81-1 during RV POLARSTERN cruise PS118. https://doi.org/10.1594/PANGAEA.919348