Equipment_Description: The TOAD was deployed from the lower arm of the vessel's J-frame. The TOAD is a camera sled based on the Guildline MiniBat model 8820 tow body. The frame has been extensively modified from its original configuration and was configured with a single ROS model 54-00100-13 color underwater video camera and two 500 W DeepSea Power & Light model 710-0400601 underwater lights mounted on the original sled frame. The MiniBAT pressure sensor and wing controller was also mounted on the frame but no wings were installed. Cable between the sled and the surface consisted of an underwater electrical cable (cable 1, blue in color) with a separate load-bearing line to support the sled frame. The electrical cable was clipped to the line at regular intervals upon deployment and removed upon recovery. The load-bearing line was led to the starboard capstan on the aft deck. All TOAD surface components were located in the Dry Lab in an equipment rack on the after bulkhead. After operations began we learned that the sled's pressure sensor was not working.
Name & address of person collecting data: John Rooney NOAA IRC NMFS/PIFSC/CRED 1845 WASP Blvd., Building 176 Honolulu, HI 96818
Data Files: Video data were recorded on two video tape recorders. The position of the camera sled was recorded using Guildline MiniBat In-Tow data acquisition software.
File naming convention: Each tow is given a name consisting of a 3-letter designator for the island area followed by a two-digit year and three-digit tow number. For example, during HI0401 the first tow was called FFS04001. Video tape labels, the navigation files (*.glo) and paper log forms are all annotated with the tow name. If the navigation file is edited during processing the file name has a suffix a added. For example, one of the navigation data files is named LIS04001a.glo. Metadata were extracted from the navigation data and recorded to a file with the same name as the navigation file except that a file type of .met was appended; for example, LIS04001a.glo.met
Time Correlation: All times are based on UTC. Two clocks were set manually synchronized prior to starting data collection; the clock in the video character generator that was used to annotate the video tape and the TOAD data acquisition computer clock was used to annotate the navigation (*.glo) files. These clocks were set to UTC at the beginning of each evening's operations and then compared to one another prior to (and during) each tow. There were problems maintaining synchronization of the TOAD computer clock during this cruise. See the problems section for a description. (Problems with data could be described here.)
Resource Description: Digital video images that are geo-referenced to navigation files.
Online Links:
Benthic Habitat Mapping Group, Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), NOAA
This data provides optical observations that will be correlated with bathymetry and acoustic backscatter imagery to develop a benthic habitat map of Lisianski 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 year, day of year, time, latitude, longitude, velocity north and east, water column depth, vehicle depth, layback, and wing angle. For this data set the fields for vehicle depth and wing angle do not contain useful data. List of navigation files: LIS04001a.glo LIS04002a.glo LIS04003.glo LIS04004a.glo LIS04005a.glo LIS04006a.glo LIS04007a.glo LIS04008.glo LIS04009.glo LIS04010a.glo LIS04011.glo LIS04012.glo LIS04013.glo in format ASCII |
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| Media you can order: | CD-ROM (format ISO 9660) |
| Data format: | List of Video Tapes: LIS04001-002, Mini DV, Master LIS04003-004, Mini DV, Master LIS04005-006, Mini DV, Master LIS04007-008, Mini DV, Master LIS04009-010, Mini DV, Master LIS04011-012, Mini DV, Master LIS04013, Mini DV, Master LIS04001-002, Mini DV, Backup LIS04003-004, Mini DV, Backup LIS04005-006, Mini DV, Backup LIS04007-008, Mini DV, Backup LIS04009-010, Mini DV, Backup LIS04011-012, Mini DV, Backup LIS04013, Mini DV, Backup in format mini digital video |
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| Media you can order: | Video cassette tape (format Mini DV) |