gov.noaa.nmfs.inport:27357
eng
UTF8
dataset
Alaska Fisheries Science Center
7600 Sand Point Way N.E., Building 4
Seattle
WA
98115
USA
http://www.afsc.noaa.gov
WWW:LINK-1.0-http--link
Website
Website for this organization
information
0700-1700 Pacific Time
resourceProvider
Intelmann, Steve
(206) 526-4157
(206) 526-6723
7600 Sand Point Way N.E., Building 4
Seattle
WA
98115
steve.intelmann@noaa.gov
pointOfContact
2024-02-29T00:00:00
ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data
ISO 19115-2:2009(E)
AFSC/RACE/GAP/McConnaughey: South Arctic Reconnaissance-2012-Klein 7180-USBL Positioning
AFSC/RACE/GAP/McConnaughey: South Arctic Reconnaissance-2012-Klein 7180- USBL Positioning
2015-09-09
publication
NOAA/NMFS/EDM
27357
https://www.fisheries.noaa.gov/inport/item/27357
WWW:LINK-1.0-http--link
Full Metadata Record
View the complete metadata record on InPort for more information about this dataset.
information
mapDigital
A custom designed Klein 7180 towed sonar was deployed from the NOAA Ship FAIRWEATHER to determine its value of acoustic backscatter as a habitat defining character. A Sonardyne Fusion USBL system was used to estimate underwater positioning of the towfish using an omnidirectional Wideband submini beacon operating in external trigger mode. Navigation data were logged in QINSy and exported into a text file. The towfish positions were then smoothed in Matlab using a custom script that implemented a weighted Hamming filter, using a window of 11 data points. These points represent the smoothed USBL navigation data for the Klein 7180 towfish during the Arctic reconnaissance transit from Dutch Harbor to Kotzebue. These smoothed towfish navigation data, however, will NOT ultimately be reinserted back into the sonar files for mosaicking and analysis. Rather, another navigation smoothing routine will be used for the final product.
The broad scope of the Essential Fish Habitat (EFH) mandate requires an efficient process for describing and mapping the habitat needs of federally managed species. For example, research indicates surficial sediments affect the distribution and abundance of many groundfish species, yet traditional sampling with grabs and cores is impractical over areas as large as the Bering Sea shelf. Acoustic tools are suitable for large-scale surveying and show great promise as a substitute for direct-sampling methods, but they have not been proven useful for EFH purposes. Acoustic seafloor surveys using different sonar systems were conducted along strong gradients of groundfish abundance, as determined from many years of RACE bottom trawl survey catches at fixed stations. Ultimately, the value of acoustic backscatter as a habitat defining character will be judged based on the statistical association between normalized backscatter and fish density. The benefits and costs of the different acoustic systems will be compared with data from multiple passes along the survey tracklines. Sediment samples, video and infauna collected along each trackline will provide additional biological and geological information for the analyses. Immediately following the Fishpac project during the summer of 2012, a single trackline was made between Dutch Harbor and Kotzebue Sound and various types of data were collected along the transit to get a glimpse at the seafloor habitat along the way.
completed
McConnaughey, Bob
bob.mcconnaughey@noaa.gov
pointOfContact
McConnaughey, Bob
bob.mcconnaughey@noaa.gov
custodian
notPlanned
navigation
side scan sonar
theme
DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce
dataCentre
Global Change Master Directory (GCMD) Data Center Keywords
2017-04-24
publication
8.5
AFSC/RACE/GAP/McConnaughey: South Arctic Reconnaissance-2012-Klein 7180
project
InPort
otherRestrictions
Cite As: Alaska Fisheries Science Center, [Date of Access]: AFSC/RACE/GAP/McConnaughey: South Arctic Reconnaissance-2012-Klein 7180-USBL Positioning [Data Date Range], https://www.fisheries.noaa.gov/inport/item/27357.
NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
otherRestrictions
Access Constraints: None
otherRestrictions
Use Constraints: None
unclassified
NOAA Data Management Plan (DMP)
NOAA/NMFS/EDM
27357
https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/27357.pdf
WWW:LINK-1.0-http--link
NOAA Data Management Plan (DMP)
NOAA Data Management Plan for this record on InPort.
information
crossReference
eng; US
oceans
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.3.0.4322
-175.318433
-165.798705
12.068817
61.404316
| Currentness: 3 day transit
2012-08-02
2012-08-04
false
eng
false
k7180_usblnav
2019-05-31
publication
dataset
A Klein 7180 towfish was operated at the 500m-range scale and towed at roughly 7-8 knots from the NOAA Ship FAIRWEATHER while attempting to maintain a constant altitude of roughly 50 percent water depth. A Sonardyne Fusion USBL system was used to estimate underwater positioning of the towfish using an omnidirectional Wideband submini beacon operating in external trigger mode. A DWS fiber-optic winch was used to deploy and retrieve the towfish and positioning was obtained by USBL. An Applanix POS/MV was used to reference the Sonardyne XYZ coordinates which were controlled in QINSy. The REDAS driver in QINSy was used to pass both ship and towfish position to Sonarpro, which logged the sonar packets in SDF2 format. A T-Count was also used to capture cable out information and was also captured by QINSy. Navigation data were exported from QINSy into a text file. The towfish positions were then smoothed in Matlab using a custom script that implemented a weighted Hamming filter, using a window of 11 data points. The smoothed towfish navigation data were NOT reinserted back in to the raw sonar files for mosaicking. Point data from the text file were finally imported into ArcGIS.
2012-10-11T00:00:00
otherRestrictions
Use Constraints: The United States Government shall not be held liable for improper or incorrect use of data described and/or contained herein. These data and related graphics are not legal documents and are not intended to be used as such. The Alaska Fisheries Science Center gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. Spatial information may not meet National Map Accuracy Standards. The information contained in these data is dynamic and may change over time. Original data were compiled from various sources. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and consistent within the limitations of geospatial data in general and these data in particular. It is strongly recommended that these data are directly acquired from an Alaska Fisheries Science Center server and not indirectly through other sources which may have changed the data in some way. Although these data have been used (processed) successfully on a computer system at the Alaska Fisheries Science Center, no warranty expressed or implied is made regarding the utility of the data on another system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data.