Optical validation data were collected using the Tethered Optical Assessment Device (TOAD), a sled equipped with underwater video camera and lights. These data are used to provide fish count and biomass maps where benthic habitat classification has been completed. Camera sled deployments were conducted during daylight hours, usually between 0600 and 1700. The duration of each tow varied but averaged about 40 minutes of bottom time at a given location. The camera sled was deployed from the starboard gunwhale of the Bonavista II. At each station the TOAD was lowered slowly to the bottom by the deck crew. The operator monitored a live video feed from the camera and began recording data on the video tape recorder. When the camera reached bottom the deck crew was notified by radio to stop lowering. The vessel then began a course of a predetermined heading maintaining a speed of approximately 1 knot for the remainder of the survey. The operator continued to monitor the vehicle and provided commands to raise or lower it to keep the camera just above the bottom.
Equipment Description: The TOAD was deployed from the starboard gunwhale of the vessel. The TOAD sled body used for the 2008 data collection is constructed from a shortened Phantom ROV body with a tail piece added for stability. It is equipped with a Deep Sea Power and Light Multi SeaCam 2060 color video camera, two 500 W DeepSea Power and Light Multi-SeaLite model 1050 underwater lights, a sonar altimeter to detect the height of the camera above the seafloor, a pair of parallel lasers to determine the size/scale of viewed objects, a compass to determine the sled heading and orientation, and a depth (pressure) sensor. The video signal from the sled is send via a coaxial conductor within a 200 m long and 127 mm diameter umbilical cable to a topside control unit. All TOAD surface components were located below deck in the V berth of the vessel within an equipment rack secured to the benches.
Data Files: Video data were recorded on a video tape recorder. The position of the camera sled was recorded using Hypack Max version 6.2b survey software. File naming convention: Each tow is given a name consisting of a 3-letter designator for the island area followed by two-digit year and three-digit tow number. For example, during BV0801 (Bonavista II's 1st cruise in calendar year 2008) the first tow was called TUT08001. Video tape labels and paper log forms are annotated with the tow name. Data files recorded in Hypack software followed their CHS filename format consisting of the year, the first two letters of the platform name, the Julian date, and the hour and minute in which the file was started. For example, a file collected on July 18, 2005 (Julian date 199) aboard the Hi'ialakai starting at time 1935 would be 2005HI1991935. Time Correlation: All times are based on UTC. Three clocks were manually synchronized prior to starting data collection; the clock in the video character generator that was used to annotate the video tape, in the video cassette recorder, and in the computer running the Hypack Max software. These clocks were set to UTC at the beginning of each day's operations.
Name & address of person collecting data:
John Rooney NOAA IRC NMFS/PIFSC/CRED 1845 WASP Blvd., Building 176 Honolulu, HI 96818
Resource Description: Digital video imagery that is geo-referenced to navigation files.
Online Links:
Benthic Habitat Mapping Group, Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Oceanic and Atmospheric Administration (NOAA)
These data will provide optical observations that will be correlated with bathymetry and acoustic backscatter imagery to create a fish biomass map of Tutuila Island. Refer to supplemental information for description of instrument and survey.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints:
- Please acknowledge the NOAA Coral Reef Ecosystem Division, Pacific Islands Fisheries Science Center as the source of this information.
These data are not to be used for navigational purposes. NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA cannot assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.
Data format: |
Each comma-delimited record contains information on the UTC date and time, horizontal position of the sled, and heading of the ship over the period of time that the camera sled is in the water.
List of navigation files: 2008BO0462029 2008BO0462310 2008BO0470000 2008BO0470030 2008BO0470206 2008BO0471845 2008BO0472019 2008BO0472232 2008BO0480000 2008BO0480001 2008BO0480002 2008BO0480039 2008BO0480134 2008BO0481808 2008BO0481809 2008BO0482056 2008BO0482056A 2008BO0482111 2008BO0482318 2008BO0482318A 2008BO0490000 2008BO0490000A 2008BO0490136 2008BO0500003 2008BO0500758 2008BO0500930 2008BO0501059 2008BO0510027 2008BO0511918 2008BO0512041 2008BO0512212 2008BO0520014 2008BO0521905 2008BO0522022 2008BO0522219 2008BO0530016 2008BO0531915 2008BO0532034 2008BO0532140 2008BO0532316 2008BO0540000A 2008BO0540043 2008BO0541938 2008BO0542127 2008BO0542129 2008BO0542255 2008BO0550000 2008BO0550000A 2008BO0550044 2008BO0551843 2008BO056005 2008BO0560124 2008BO056192 in format ASCII |
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Network links: |
http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_tutuila_optical.htm |
Media you can order: | CD-ROM (format ISO 9660) |
Data format: |
38h 8m of video data are available covering 83.2 km of seabed. These data were recorded on 47 video tapes
List of video tapes: TUT08001 (Tape A), Mini DV Master, DVD Backup TUT08001 (Tape B), Mini DV Master, DVD Backup TUT08002, Mini DV, Master, DVD Backup TUT08003, Mini DV, Master, DVD Backup TUT08004, Mini DV, Master, DVD Backup TUT08005, Mini DV, Master, DVD Backup TUT05006 (Tape A), Mini DV Master, DVD Backup TUT08006 (Tape B), Mini DV Master, DVD Backup TUT05007 (Tape A), Mini DV Master, DVD Backup TUT08007 (Tape B), Mini DV Master, DVD Backup TUT08008, Mini DV Master, DVD Backup TUT08009, Mini DV Master, DVD Backup TUT08010 (Tape A), Mini DV Master, DVD Backup TUT08010 (Tape B), Mini DV Master, DVD Backup TUT08010 (Tape C), Mini DV Master, DVD Backup TUT08011, Mini DV Master, DVD Backup TUT08012, Mini DV Master, DVD Backup TUT08013, Mini DV Master, DVD Backup TUT08014, Mini DV Master, DVD Backup TUT05015, Mini DV Master, DVD Backup TUT08016, Mini DV Master, DVD Backup TUT05017, Mini DV Master, DVD Backup TUT08018 (Tape A), Mini DV Master, DVD Backup TUT08018 (Tape B), Mini DV Master, DVD Backup TUT08019, Mini DV Master, DVD Backup TUT08020, Mini DV Master, DVD Backup TUT08021 (Tape A), Mini DV Master, DVD Backup TUT08021 (Tape B), Mini DV Master, DVD Backup TUT08022, Mini DV Master, DVD Backup TUT08023, Mini DV Master, DVD Backup TUT08024, Mini DV Master, DVD Backup TUT08025, Mini DV Master, DVD Backup TUT08026, Mini DV Master, DVD Backup TUT08027, Mini DV Master, DVD Backup TUT08028, Mini DV Master, DVD Backup TUT08029, Mini DV Master, DVD Backup TUT08030, Mini DV Master, DVD Backup TUT08031, Mini DV Master, DVD Backup TUT08032 (Tape A), Mini DV Master, DVD Backup TUT08032 (Tape B), Mini DV Master, DVD Backup TUT08033, Mini DV Master, DVD Backup TUT08034 (Tape A), Mini DV Master, DVD Backup TUT08034 (Tape B), Mini DV Master, DVD Backup TUT08035, Mini DV Master, DVD Backup TUT08036, Mini DV Master, DVD Backup TUT08037, Mini DV Master, DVD Backup TUT08038, Mini DV Master, DVD Backup in format mini digital video (and DVD) |
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Media you can order: | Video cassette tape (format Mini DV) |
Data format: | MP4 |
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Network links: |
http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_optical_data.html |