SI 1002 Approaches to Darwin, Beagle Gulf NT (HIPP) Bathymetry Acquisition (20200018S)

Brief description

The Approaches to Darwin, Beagle Gulf bathymetry survey was acquired for the Australian Hydrographic Office (AHO) onboard the M/V Limitless and PHS Zephyr during the period 26 June – 30 August 2020. This was a contracted survey conducted as part of the HydroScheme Industry Partnership Program (HIPP). The survey area lies North-West of Cox Peninsula, encompassing South Gutter and is bounded by North Gutter, Fenton Patches and Fish Reef. Bathymetry data was acquired using a Kongsberg R2Sonic 2026 and R2Sonic 2024 and processed using QPS Qimera V2.0.1. The dataset was then exported to GeoTIFF using CARIS HIPS and SIPS software. This dataset contains a 30m-resolution 32-bit floating point GeoTIFF file. This dataset is not to be used for navigation.

Lineage

Maintenance and Update Frequency: asNeeded

Statement: AusSeabed follows the recommended processing methodology as prescribed by the AusSeabed Multibeam Guidelines. Please note that certain products are subject to routine update (e.g. resolution, coverage, temporal variation, guidelines/best practice). The client is advised to refer to the latest version of all documents and products for the most up-to-date material. For eCat records the version is expressed in the record title whilst products incorporate date of production as per AusSeabed’s file naming convention. This surface is a 30 metre Shoal Depth True Position (SDTP) surface derived from International Hydrographic Organisation (IHO) Order 1A, 1 and 2 metre Combined Uncertainty and Bathymetry Estimator (CUBE) surfaces supplied to the Australian Hydrographic Office (AHO), with depth, position, density and uncertainty preserved from the original surface. Full resolution surfaces available from AHO on request under restricted licence.

Survey metadata:
aho_id: 2313813
version: 1
name: SI 1002 Approaches to Darwin, Beagle Gulf, NT
nb-of-points: 5128
north: -12.0973612
south: -12.4180436
east: 130.7173298
west: 130.4173621
boundingbox-crs: EPSG:4326
start-date: 9-Jul-20
end-date: 28-Aug-21
survey area: Approaches to Darwin, Beagle Gulf, NT
platform-class: Ship
vessel: MV Limitless
surveyor: Mathieu Bestille
external-reference: SI 1002
classification: Unclassified
abstract: This is a contracted survey conducted for the Australian Hydrographic Office by Precision Hydrographic Services as part of the Hydroscheme Industry Partnership Program (HIPP). The survey area is east of Approaches to Darwin, Beagle Gulf, NT. NOT TO BE USED FOR NAVIGATION.
Lineage (Description): This surface is a 30 metre Shoal Depth True Position (SDTP) surface derived from International Hydrographic Organisation (IHO) Order 1A, 1 and 2 metre Combined Uncertainty and Bathymetry Estimator (CUBE) surfaces supplied to the Australian Hydrographic Office (AHO), with depth, position, density and uncertainty preserved from the original surface. Full resolution surfaces available from AHO on request under restricted licence.
data-owner: Australian Hydrographic Office, Commonwealth of Australia
custodian: Geoscience Australia, Commonwealth of Australia
point-of-contact: hydro.licensing@defence.gov.au
legal-constraints: Creative Commons CC BY 4.0
geodetic-datum: EPSG:4326
projection: Latitude/Longitude (WGS 84)
vertical-datum: Mean Sea Level (MSL)
instrument-type: Multibeam Echosounder (MBES)
sensor-type: R2Sonic 2026 & R2Sonic 2024 MBES
sensor-frequency: 400 kHz
horizontal-positioning-method: Applanix POS MV GNSS with satellite corrections from the Fugro MarineSTAR network
vertical-reduction-method: Reduced to LAT using an AHO approved tidal model based on observed tides. Final adjustment to MSL by AHO
accepted-soundings-accuracy (unit(m)): 0.2
accepted-positional-accuracy (unit(m)): 1.6
accepted-survey-order: Order 1A
accepted-survey-order-url: https://iho.int › pubs › S-44_Edition_6.0.0_EN.pdf
usage-limitation: Not to be used for Navigation
contact-address: 8 Station St, Wollongong, NSW, Australia 2500
GCMD-keyword: EARTH SCIENCE>OCEANS>BATHYMETRY/SEAFLOOR TOPOGRAPHY
GA-keyword: AusSeabed, Bathymetry, Marine, Bathymetry Grids
name of survey contractor: Precision Hydrographic Services
statement_of_requirements: HIPP SOR 2020 v1.2
year of installation: 2021
number of sensor heads: 2
number of soundings: Up to 1024 per ping
beamwidth along track (degree): 1
beamwidth across track (degree): 0.5
pulse length (µs): 15
absorption (dB/km): N/A
selectable depth range (m): N/A
vessel speed (kt): 7
start location: Darwin, NT
end location: Darwin, NT
sensor operating mode: N/A
sensor swath (degrees): 120
grid sounding density: 95% of nodes >5 soundings per node at survey resolution
processing software: QPS Qimera V2.2.3
processing methodology: Processed in accordance with HIPP Statement of Requirements 2020 v1.2 using Combined Uncertainty and Bathymetry Estimator (CUBE) techniques, 1 and 2m CUBE surfaces generated as the final L3 dataset.
grid resolution (m): 30
number of grids: 1


Processing methodology:
This dataset was produced using CARIS HIPS & SIPS as follow:
1. Processed in accordance with HIPP SOR 2020v 1.2 using CUBE techniques, 1m and 2m CUBE surfaces generated as the final L3 product (a gridded surface derived from cleaned point data).
2. Data was provided to Geoscience Australia for publication.
3. The final processed grid was exported as a 32-bit floating point Geotiff at 30 m resolution, referenced to MSL, WGS 84 (EPSG:4326).

DATA QUALITY

This dataset has been subject to independent post-production validation and testing. Tests have been performed for data completeness, correct spatial representation, attribute accuracy, logical consistency, metadata completeness and correctness, and where appropriate for compliance with Geoscience Australia's data dictionaries.
Errors found in this dataset should be reported to:
Corporate Data Manager
Geoscience Australia
GPO Box 378
Canberra ACT 2601, Australia
Email: Sales@ga.gov.au
Reported Errors will be rectified in subsequent data releases, if any.

Notes

Purpose
Bathymetry Survey