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Metadata: 11209 HOW03 GP1B Lot 4 Geophysical UHR Survey 2018 - Magnetometer
Abstract:
Wind Farm Identifier: HOW03 LOT4; Survey Details: Geophysical 1b pre-geotechnical UXO survey acquiring magnetometer array, bathymetry, side scan sonar, sub bottom profiler, ultra-high resolution multichannel seismic and environmental grab sample data across wind farm and along export cable corridor. Acquired by Gardline Limited. Geophysical Acquisition Dates 2018-05-01 to 2018-09-07. Projection: Horizontal datum: ETRS89 (2018.0) Ellipsoid name: GRS 1980 Coordinate system: UTM 31N Vertical Datum LAT
Data holder:
Gardline Limited
Click on the red button for resource contact details:
- Click on the red button for resource contact details
Use constraints:
Use of this data requires approval from Orsted
| Other details | ||
| Internal code | Internally assigned metadata identifier | 967 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | 11209 HOW03 GP1B Lot 4 Geophysical UHR Survey 2018 - Magnetometer |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | 3dc88bc6166972a044f3d1fdb57b6fb5 |
| Resource Identifier | This is the code assigned by the data owner. | 11209 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2018-05-01 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2018-09-07 |
| Vertical extent (min) | A positive or negative decimal number, for example, the shallowest depth recorded if subtidal, or, if intertidal, the lowest point recorded. | 26.9800 |
| Vertical extent (max) | A positive or negative decimal number, for example, the deepest depth recorded if subtidal, or, if intertidal, the highest point recorded. | 72.9100 |
| Vertical extent reference | This descibes the vertical coordinate reference system as referred to in the EPSG register of geodetic parameters. (epsg-registry.org) | urn:ogc:def:crs:EPSG::5861 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | inapplicable |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | continual |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | Wind Farm Identifier: HOW03 LOT4; Survey Details: Geophysical 1b pre-geotechnical UXO survey acquiring magnetometer array, bathymetry, side scan sonar, sub bottom profiler, ultra-high resolution multichannel seismic and environmental grab sample data across wind farm and along export cable corridor. Acquired by Gardline Limited. Geophysical Acquisition Dates 2018-05-01 to 2018-09-07. Projection: Horizontal datum: ETRS89 (2018.0) Ellipsoid name: GRS 1980 Coordinate system: UTM 31N Vertical Datum LAT |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Magnetometer Raw Data, Vessel: M.V. Ocean Endeavour Equipment Type: Geometrics G882 Caesium Vapour Magnetometer. Navigation Data Processing carried out using Gardline in House Voyager5 Software. Raw USBL data were opened in Voyager5 and manually checked and corrected for any spikes or erroneous points. Once data cleaning has been carried out a light smooth filter of 11 points was added to the data which was then exported in a shapefile format. No data processing was carried out on the Magnetometer data. Total Positional Uncertainty derived from the Ranger 2 USBL System 0.4% 1DRMS. Ping Rate 10Hz. Data created using Geosoft Oasis Montaj. Processed Magnetometer Data, Vessel: M.V. Ocean Endeavour Equipment Type: Geometrics G882 Magnetometer at a ping rate of 10Hz. Navigation Supplied using Sonardyne Ranger USBL Navigation Data Processing carried out using Gardline in House Voyager5 Software. Raw data were opened in Voyager5 and manually checked and corrected for any spikes or erroneous points. Once data cleaning has been carried out a light smooth filter of 11 points was added to the data which was then exported in a shapefile format. Data Processing carried out using Geosoft Oasis Montaj Version 9.1.3. Data is despiked and data points outside of depth tolerance masked. The Clean Total Field is then filtered and smoothed before being subtracted from the result to produce the Residual Field. Total Positional Uncertainty derived from USBL - 0.4% 1DRMS. Magnetometer Residual Field Grid, Vessel: M.V. Ocean Endeavour Equipment Type: Geometrics G882 Magnetometer and Sonardyne Ranger USBL System. Navigation Data Processing carried out using Gardline in House Voyager5 Software. Raw USBL data were opened in Voyager5 and manually checked and corrected for any spikes or erroneous points. Once data cleaning has been carried out a light smooth filter of 11 points was added to the data which was then exported in our Gardline Sensor file format. Magnetometer Data processing has been carried out using Geosoft Oasis Montaj Version 9.1.3. Data were subject to despiking, a Non Linear Filter (800 samples, tolerance of 0.5) to fit a background to the dataset, then subtracted from total field to give the residual. Residual gridding with a 1m grid cell size and a 20m blanking distance. Total Positional Uncertainty derived from the USBL data - 0.4% at 1DRMS. Data Resolution - 1m x 1m. Blanking Distance - 20m. Magnetometer Total Field Grid, Vessel: M.V. Ocean Endeavour Equipment Type: Geometrics G882 Magnetometer and Sonardyne Ranger USBL System. Navigation Data Processing carried out using Gardline in House Voyager5 Software. Raw USBL data were opened in Voyager5 and manually checked and corrected for any spikes or erroneous points. Once data cleaning has been carried out a light smooth filter of 11 points was added to the data which was then exported in our Gardline Sensor file format. Magnetometer Data processing has been carried out using Geosoft Oasis Montaj Version 9.1.3. Data were subject to Despiking then Minimum Curvature gridding with a 1m grid cell size and 20m blanking distance. Navigation Data Collected. Total Positional Uncertainty derived from the USBL data - 0.4% at 1DRMS. Data Resolution - 1m x 1m. Blanking Distance - 20m. Magnetometer Signal Strength Grid, Vessel: M.V. Ocean Endeavour Equipment Type: Geometrics G882 Magnetometer and Sonardyne Ranger USBL System. Navigation Data Processing carried out using Gardline in House Voyager5 Software. Raw USBL data were opened in Voyager5 and manually checked and corrected for any spikes or erroneous points. Once data cleaning has been carried out a light smooth filter of 11 points was added to the data which was then exported in our Gardline Sensor file format. Magnetometer Data processing has been carried out using Geosoft Oasis Montaj Version 9.1.3. Data were subject to a direct gridding algorithm with a 1m grid cell size prior to export. Navigation Data Collected. Total Positional Uncertainty derived from the USBL data - 0.4% at 1DRMS. Data Resolution - 1m x 1m. Magnetometer Altitude Grid, Vessel: M.V. Ocean Endeavour Equipment Type: Geometrics G882 Magnetometer and Sonardyne Ranger USBL System. Navigation Data Processing carried out using Gardline in House Voyager5 Software. Raw USBL data were opened in Voyager5 and manually checked and corrected for any spikes or erroneous points. Once data cleaning has been carried out a light smooth filter of 11 points was added to the data which was then exported in our Gardline Sensor file format. Magnetometer Data processing has been carried out using Geosoft Oasis Montaj Version 9.1.3. Data were subject to despiking and a direct gridding algorithm with a 1m grid cell size prior to export. Navigation Data Collected. Total Positional Uncertainty derived from the USBL data - 0.4% at 1DRMS. Data Resolution - 1m x 1m Oasis Montaj Magnetometer Processing Project, Vessel: M.V. Ocean Endeavour Equipment Type: Sonardyne Ranger USBL and Geometrics G882 Magnetometer. Navigation Data Processing carried out using Gardline in House Voyager5 Software. Raw data were opened in Voyager5 and manually checked and corrected for any spikes or erroneous points. Once data cleaning has been carried out a light smooth filter of 11 points was added to the data which was then exported in a sensor format. All raw magnetometer data, all processed magnetometer data and magnetometer targets database were loaded processing carried out using Geosoft Oasis Montaj Version 9.1.1. Loaded into the project is raw magnetometer data, processed magnetometer data and targets all in individual databases. Database file type within Oasis: .gdb (compressed for size). Data line paths and magnetometer altitude, signal strength, residual, total field and analytical signal grids all loaded on to the Map. Map Scale: 120,000. Grid file type within Oasis: .grd (32-bit float). Total Positional Uncertainty derived from the USBL System - 0.4% 1DRMS. No decimation is applied. Magnetic anomalies SHP and CSV. Vessel: M.V. Ocean Endeavour. Equipment Type: Fugro Starpack Navigation Package, Geometrics G882 Magnetometer and Sonardyne Ranger USBL System. Navigation Data Processing Carried out using Gardline in House Voyager5 Software. Raw USBL data were opened in Voyager5 and manually checked and corrected for any spikes or erroneous points. Once data cleaning has been carried out a light smooth filter of 11 points was added to the data which was then exported in our Gardline Sensor file format. Magnetometer Data processing has been carried out using Geosoft Oasis Montaj Version 9.1.1. Data were subject to despiking, a Non Linear Filter (800 samples, tolerance of 0.5) to fit a background to the dataset, then subtracted from total field to give the residual. This residual will then be gridded at an appropriate grid cell size and blanking distance using the minimum curvature gridding method, and derivative grids calculated, along with a final Analytical Signal (AS) grid, which represents the gradient of an anomaly in nT/m. This AS grid will be used for target picking utilizing the Blakely Test in Oasis Montaj. The targets will then be reviewed, and duplicate targets on the same anomaly removed, this will leave a single target for each anomaly. Magnetometer targets are classified as anomalies unless there is a an associated seafloor contact, in which case the target will be classified as debris unless it is known infrastructure, a wreck or fishing equipment/pots. Total Positional Uncertainty derived from the Ranger 2 USBL System 0.4% 1DRMS. The minimum threshold for target analysis was 2nT. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Elevation | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Hydrography | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Bathymetry and Elevation | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 54 |
| East | The eastern-most limit of the data resource in decimal degrees | 2.79 |
| South | The southern-most limit of the data resource in decimal degrees | 53.69 |
| West | The western-most limit of the data resource in decimal degrees | 2.21 |
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | Gardline Limited | |
| Individual name | David Gordon | |
| Position name | Principle Client Reporting Manager | |
| dassh.enquiries@mba.ac.uk | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Gardline Limited | |
| Individual name | David Gordon | |
| Position name | Principle Client Reporting Manager | |
| dassh.enquiries@mba.ac.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Gardline Limited | |
| Individual name | David Gordon | |
| Position name | Principle Client Reporting Manager | |
| dassh.enquiries@mba.ac.uk | ||
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | Gardline Limited | |
| Individual name | David Gordon | |
| Position name | Principle Client Reporting Manager | |
| dassh.enquiries@mba.ac.uk | ||
| Dataset constraints | ||
| 20 Limitations on Public Access - Access constraints | otherRestrictions | |
| 20 Limitations on Public Access - Other constraints | This states any limitations on access to the data and uses free text. | Use of this data requires approval from Orsted |
| 21 Conditions for Access and Use - Use limitation | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | Use of this data requires approval from Orsted |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2018-09-19 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-12 |
| Metadata date | The date when the content of this metadata record was last updated. | 2018-10-10 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery metadata standard |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 2.3.8 |