Processed line aeromagnetic data over Ellsworth Land (2001)

During the 2001-02 field season a regional survey was flown on a 10 km line spacing grid over the drainage basin of the Rutford Ice stream (West Antarctica), as part of the TORUS (Targeting ice stream onset regions and under-ice systems) project. We present here the processed line aeromagnetic data collected using scintrex cesium magnetometers mounted in the BAS aerogeophysically equipped Twin Otter aircraft.

Data are provided as XYZ ASCII line data.

Date (Creation): 2019-12-04

Date (Revision): 2019-12-04

Date (Publication): 2019-12-04

Date (released): 2019-12-04

Edition: 1.0

Unique resource identifier: https://doi.org/10.5285/2e0ebbc5-1539-4f3c-873d-c62ea354c35c

Codespace: doi

Unique resource identifier: GB/NERC/BAS/PDC/01279

Codespace: https://data.bas.ac.uk/

Other citation details: Please cite this item as: Ferraccioli, F., Jones, P., & Smith, A. (2020). Processed line aeromagnetic data over Ellsworth Land (2001) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/2e0ebbc5-1539-4f3c-873d-c62ea354c35c

Credit: No credit.

Status: Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey	Ferraccioli, Fausto		Author
British Antarctic Survey	Jones, P.		Author
British Antarctic Survey	Smith, Andrew		Author
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Point of contact

Maintenance and update frequency: As needed

Maintenance note: Completed

Global Change Master Directory (GCMD) Science Keywords

EARTH SCIENCE > Solid Earth > Geomagnetism > Magnetic Anomalies

Theme

Aerogeophysical
Aeromagnetics
Antarctic

Place

Ellsworth Land Antarctica

GEMET - INSPIRE themes, version 1.0

Geology

Access constraints: Other restrictions

Other constraints: no limitations to public access

Access constraints: Other restrictions

Other constraints: no limitations

Use constraints: License

Other constraints: Open Government Licence v3.0

Use constraints: Other restrictions

Other constraints: This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/

Use constraints: Other restrictions

Other constraints: Further by downloading this data the user acknowledges that they agree with the NERC data policy (), and the following conditions:

1. To cite the data in any publication as follows:

Ferraccioli, F., Jones, P., & Smith, A. (2020). Processed line aeromagnetic data over Ellsworth Land (2001) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/2E0EBBC5-1539-4F3C-873D-C62EA354C35C

2. The user recognizes the limitations of data. Use of the data is at the users' own risk, and there is no warranty as to the quality or accuracy of any data, or the fitness of the data for your intended use. The data are not necessarily fully quality assured and cannot be expected to be free from measurement uncertainty, systematic biases, or errors of interpretation or analysis, and may include inaccuracies in error margins quoted with the data.

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Spatial representation type: Text, table

Language: English

Character set: UTF8

Topic category

Geoscientific information

Begin date: 2001-11-21

End date: 2001-12-11

Supplemental Information: It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.

Title: European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication): 2008-11-12

Cited responsible party

Organisation name	Individual name	Electronic mail address	Role
European Petroleum Survey Group		EPSGadministrator@iogp.org	Publisher

Unique resource identifier: urn:ogc:def:crs:EPSG::3031

Version: 6.18.3

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Distributor contact

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Distributor

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text/plain

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Transfer size: 31457280

OnLine resource

Protocol	Linkage	Name
WWW:LINK-1.0-http--link	https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=2e0ebbc5-1539-4f3c-873d-c62ea354c35c	Get Data

Hierarchy level: Dataset

Statement: Methodology:

TORUS aeromagnetic dataset available here includes all channels from raw through to levelled, and draped products. Channel naming follows SCAR/ADMAP2 data release protocols.

Also included in the available database are base level survey lines flown previously which complement the main TORUS grid. These lines have been processed in accordance with SCAR/ADMAP2 protocols but have not been levelled with TORUS data.

Magnetic data channels and processing flow:

Note that TORUS processing work flow is ordered differently to ADMAP2 protocols, but naming conventions, compensations and corrections are adhered to.

MagR- Raw magnetic total field intensity data (nT).

MagC- Compensated, or low pass filtered magnetic data. Adjustments to compensate for aircraft roll, pitch and yaw were applied.

TCorr- Tiptank corrections (nT). These include DC shifts and gradients due to aircraft noice, etc. Dummy values if not applicable.

MagTC- Compensated magnetic value adjusted for Tip tanks (where used). MagTC= MagC- TCorr (nT).

BCorr- Low pass filtered (60 minute) magnetic base station correction.

MagBTC- Compensated, tip tank and base station corrected mag. MagBTC= MagTC-BCorr (nT)

RefField- Geomagnetic reference field value for which the magnetic data has been compensated. IGRF model 2010 as implemented in Geosoft (nT).

MagBRTC- calculated as MagBRTC= MagBTC- RefField (nT).

SCorr- Low pass filter (25 fiducials) applied to extra lines merged into the database with remnant noise.

MagF- Final mag value before levelling (nT).

MagL- Statistically levelled mag data (nT).

MagML- Microlevelled magnetic data following technique of (Ferraccioli et al., 1998). Note tie lines are not included in the microlevelled data channel (nT).

Basic channel description:

Line name Line Number

Flight ID Sequential flight number

x x projected meters*

y y projected meters*

Lon Longitude WGS 1984,

Lat Latitude WGS 1984,

Height_WGS1984 Aircraft altitude (meters) in WGS 1984,

Date Date of flight in time format e.g. 2006/01/08

Time Time (UTC) of flight e.g. 23:52:42.0

*Projected coordinates (x and y) are in Lambert conic conformal with two standard parallels defined as follows:

Latitude of natural origin: -71

Longitude of natural origin: 0

Scale factor at natural origin 0.994

False easting 0

False northing 2082760.109

Metadata

File identifier: 2e0ebbc5-1539-4f3c-873d-c62ea354c35c XML

Metadata language: English

Character set: UTF8

Hierarchy level: Dataset

Hierarchy level name: dataset

Date stamp: 2019-12-04

Metadata standard name: ISO 19115 Geographic Information - Metadata

Metadata standard version: ISO 19115:2003(E)

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		polardatacentre@bas.ac.uk	Point of contact

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