2007 Reson 8101ER Multibeam Sonar Data from Cruise AHI0702 - Guam and the Commonwealth of the Northern Mariana Islands

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Frequently anticipated questions:


What does this data set describe?

Title:
2007 Reson 8101ER Multibeam Sonar Data from Cruise AHI0702 - Guam and the Commonwealth of the Northern Mariana Islands
Abstract:
Reson 8101ER multibeam Data were collected between 9 May - 19 May 2007 aboard NOAA Survey Launch Acoustic Habitat Investigator (AHI) at Santa Rosa Reef, Guam Island, Saipan Island, Rota Island, Aguijan Island, and Tinian Island, Western Pacific during cruise AHI0702. These multibeam data were collected using SAIC ISS-2000 software in the Generic Sensor Format and processed using SABER editing software. Sound velocity corrections from a Seabird SBE19 CTD sensor and motion corrections from a POS-MV vertical reference were applied to the data in real time.

Predicted tides were applied to the data in real time using predicted tides downloaded from NOAA's National Ocean Service Center for Operational Oceanographic Products and Services (CO-OPS) website.

Horizontal accuracy is ~5m, DGPS from NavCom sensor from C&C Technologies was used, vertical accuracy is depth dependent (~1% of water depth), WGS84 datum. These data are not to be used for navigation. Depths mapped range from 5 - 350 m. The AHI was deployed from the NOAA Ship Hi'ialakai and concurrent mapping was done using the Simrad EM300 sonar aboard the ship; metadata for HI0702 are submitted separately.

Supplemental_Information:
Data were collected aboard the R/V AHI (Acoustic Habitat Investigator), a 8 m (25') survey launch owned and operated by the NOAA Pacific Islands Fisheries Science Center in Honolulu, HI. The R/V AHI's survey sensors include a 240 kHz RESON 8101-ER sonar which measures bathymetry and acoustic backscatter imagery, a TSS/Applanix POS/MV Model 320 which measures time, position, velocity, attitude and heading, and a Seabird SBE 19 CTD used to measure sound velocity profiles. A C&C Technologies NavCom sensor and the C-NAV RTG network, which is a global system for the distribution of differential GPS corrections, was used for navigation.

The AHI's equipment serial numbers, software versions and sensor configuration settings are as follows:

RESON 8101-ER multibeam echosounder Transducer serial #: 201004 Firmware, dry: 8101-2.07-2D4D Firmware, wet: 8101-1.06-2F6B

R/V AHI POS/MV Model 320, version 4.0000 PCS serial #: 2514 IMU serial #: 203 Controller software: v 3.4.0.0 PCS Firmware: 3.41

Seabird SBE19 CTD: Serial #: 3029 Calibrated 12/28/2006

C&C Technologies NavCom Serial #5111

R/V AHI Lever Arm Distances and Alignment Offsets: The R/V AHI Reference Point (RP) is defined to be the intersection of the vessel's centerline, the cabin deck and the bulkhead immediately aft of the transducer. This is marked by a punch in the deck weld at that location. Positive X means the point is forward of the RP, positive Y means the point is to starboard of the RP, positive Z means the point is below the RP. The loaded waterline is defined as the intersection of the vessel's performance wing with the hull at the transom. A vessel offset survey and patch test were performed in March 2007 and the settings shown here reflect these data.

POS/MV Settings: RP to IMU, m 0.796 0.001 0.078 RP to Primary GPS(port),m 0.869 -0.472 -2.284 RP to Vessel, m 0.144 0.009 0.786 IMU w.r.t. Ref. Frame, deg 0.000 0.000 0.000 RP to Heave lever arm, m -0.670 0.000 0.000 RP to Sensor 1(MB transducer), m 0.144 0.009 0.786 RP to Sensor 2 0 0 0 Sensor 1 rotation Ref. Frame, deg 0 0 0 Sensor 2 rotation Ref. Frame, deg 0 0 0 Antenna Baseline Distance: 1.229

ISS2000 Settings for RESON DTC: Roll Bias, deg 0.15 Pitch Bias, deg 0.0 Gyro Bias, deg 0.0 Transducer depth, m 0.62

Resource Description: Reson 8101ER Multibeam Sonar Data from Cruise AHI0701 (R/V AHI)

  1. How should this data set be cited?

    Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), 20070824, 2007 Reson 8101ER Multibeam Sonar Data from Cruise AHI0702 - Guam and the Commonwealth of the Northern Mariana Islands.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: 144.6140
    East_Bounding_Coordinate: 145.2254
    North_Bounding_Coordinate: 15.2500
    South_Bounding_Coordinate: 13.2406

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 09-May-2007
    Ending_Date: 19-May-2007
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: Generic Sensor Format (GSF) digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

    2. What coordinate system is used to represent geographic features?

  7. How does the data set describe geographic features?


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    NOAA PIFSC CRED PIBHMC and JIMAR

  3. To whom should users address questions about the data?

    Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
    NOAA IRC
    Honolulu, HI 96818

    808 725-5360 (voice)
    808 725-5429 (FAX)
    nmfs.pic.credinfo@noaa.gov

    Contact_Instructions: e-mail preferred


Why was the data set created?

The data were collected in support of Coral Reef Conservation Program goals to map all shallow (0-30 m)coral reefs in US Pacific waters and priority moderate (> 30 m)depth areas by 2009. The data are being used to provide bathymetric and backscatter data for previously unmappedareas; in support of ecosystem management requirements for benthic habitat mapping and location of Essential Fish Habitat; and to study the geologic features of the area.


How was the data set created?

  1. From what previous works were the data drawn?

    Reson 8101ER (source 1 of 1)
    NOAA PIFSC CRED PIBHMC and JIMAR, 20070824, Reson 8101ER multibeam bathymetric data.

    Type_of_Source_Media: Digital data
    Source_Contribution:
    Reson 8101ER (240 kHz) bathymetry and imagery data were collected in depths of ~10-350 m.

  2. How were the data generated, processed, and modified?

    Date: Unknown (process 1 of 1)
    None

  3. What similar or related data should the user be aware of?


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    Horizontal accuracy is ~5 m as data were collected using DGPS using C-NAV satellite correctors. Vertical accuracy of multibeam data is estimated at 1% of water depth; predicted tidal corrections were applied.

  2. How accurate are the geographic locations?

    Variable

  3. How accurate are the heights or depths?

    Variable

  4. Where are the gaps in the data? What is missing?

    Varies

  5. How consistent are the relationships among the observations, including topology?

    These data are believed to be logically consistent though no tests were performed


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None.
Use_Constraints: These data are NOT TO BE USED FOR NAVIGATION

  1. Who distributes the data set? (Distributor 1 of 1)

    Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
    NOAA IRC
    Honolulu, HI 96818

    808 725-5360 (voice)
    808 725-5429 (FAX)
    nmfs.pic.credinfo@noaa.gov

    Contact_Instructions: e-mail preferred
  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    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.

  4. How can I download or order the data?

  5. Is there some other way to get the data?

    Please contact the Distributor (see above) for distribution options

    These data are also archived through NOAA's National Geophysical Data Center at <http://www.ngdc.noaa.gov/mgg/bathymetry/multibeam.html>

    Data Format - Generic Sensor Format, as described in <http://www.ldeo.columbia.edu/res/pi/MB-System/formatdoc/gsf_spec.pdf>


Who wrote the metadata?

Dates:
Last modified: 12-Mar-2014
Last Reviewed: 18-Mar-2011
Metadata author:
Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
NOAA IRC
Honolulu, HI 96818

808 725-5360 (voice)
808 725-5429 (FAX)
nmfs.pic.credinfo@noaa.gov

Contact_Instructions: e-mail preferred
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)


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