Processed line aerogravity data from the FISS 2016 surveys covering the Filchner and Halley Ice Shelves, and the English Coast (western Palmer Land), West Antarctica (2016/2017)

Three separate airborne radar surveys were flown during the austral summer of 2016/17 over the Filchner Ice Shelf and Halley Ice Shelf (West Antarctica), and over the outlet glacier flows of the English Coast (western Palmer Land, Antarctic Peninsula) during the Filchner Ice Shelf System (FISS) project. This project was a NERC-funded (grant reference number: NE/L013770/1) collaborative initiative between the British Antarctic Survey, the National Oceanography Centre, the Met Office Hadley Centre, University College London, the University of Exeter, Oxford University, and the Alfred Wenger Institute to investigate how the Filchner Ice Shelf might respond to a warmer world, and what the impact of sea-level rise could be by the middle of this century.





The 2016/17 aerogeophysics surveys acquired a total of ~26,000 line km of aerogeophysical data. The FISS survey consisted of 17 survey flights totalling ~16,000 km of radar data over the Support Force, Recovery, Slessor, and Bailey ice streams of the Filchner Ice Shelf. The Halley Ice Shelf survey consisted of ~4,600 km spread over 5 flights and covering the area around the BAS Halley 6 station and the Brunt Ice Shelf. The English Coast survey consisted of ~5,000 km spread over 7 flights departing from the Sky Blu basecamp and linking several outlet glacier flows and the grounding line of the western Palmer Land, including the ENVISAT, CRYOSAT, GRACE, Landsat, Sentinel, ERS, Hall, Nikitin and Lidke ice streams.





Our Twin Otter aircraft was equipped with dual-frequency carrier-phase GPS for navigation, radar altimeter for surface mapping, wing-tip magnetometers, an iMAR strapdown gravity system, and a new ice-sounding radar system (PASIN-2).





We present here the processed line aerogravity data collected using the iMAR strapdown gravity system mounted in the BAS aerogeophysically equiped Twin Otter aircraft.





Data are provided as XYZ ASCII line data.

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Date (Creation)
2021-10-14
Date (Revision)
2021-10-14
Date (Publication)
2021-10-14
Date (released)
2021-10-14
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1.0
Unique resource identifier
https://doi.org/10.5285/b3e51c6e-20fd-4e3a-be47-0ed2efcaa0ab
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doi
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GB/NERC/BAS/PDC/01574
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https://data.bas.ac.uk/

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NE/L013770/1
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Please cite this item as: Becker, D., Jordan, T., Robinson, C., & Corr, H. (2021). Processed line aerogravity data from the FISS 2016 surveys covering the Filchner and Halley Ice Shelves, and the English Coast (western Palmer Land), West Antarctica (2016/2017) (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/b3e51c6e-20fd-4e3a-be47-0ed2efcaa0ab

Credit

No credit.
Status
Completed
Point of contact
Organisation name Individual name Electronic mail address Role
Technische Universitaet Darmstadt

Becker, David

 		Author
British Antarctic Survey Jordan, Tom Author
British Antarctic Survey

Robinson, Carl

 		Author
British Antarctic Survey

Corr, Hugh

 		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
Theme

  • Aerogeophysics

  • Antarctica

  • Gravity
Place

  • English Coast Antarctica

  • Slessor Glacier Antarctica

  • Recovery Glacier Antarctica

  • Bailey Ice Stream Antarctica

GEMET - INSPIRE themes, version 1.0
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This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/

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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:



Becker, D., Jordan, T., Robinson, C., & Corr, H. (2021). Processed line aerogravity data from the FISS 2016 surveys covering the Filchner and Halley Ice Shelves, and the English Coast (western Palmer Land), West Antarctica (2016/2017) (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/B3E51C6E-20FD-4E3A-BE47-0ED2EFCAA0AB





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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Begin date
2016-12-29
End date
2017-01-21
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

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

6.18.3

Distributor

Distributor contact
Organisation name Individual name Electronic mail address Role
NERC EDS UK Polar Data Centre

PDCServiceDesk@bas.ac.uk

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text/plain
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bytes
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19922944
OnLine resource
Protocol Linkage Name

WWW:LINK-1.0-http--link

 		https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=b3e51c6e-20fd-4e3a-be47-0ed2efcaa0ab

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Methodology:

Gravity results for the 2016/2017 FISS campaign, taken from the iMAR iNAV-RQH1003 sensor (total: 24 flights).





The IMU/GNSS-strapdown gravity data processing was done by David Becker, Physical and Satellite Geodesy, TU Darmstadt, with a processing software that was developed at this institute.





The cross-over-residuals suggest a data precision (unlevelled) of approx. 1.7 mGal.





No terrestrial gravity ties were available for this campaign, so the determination of the absolute gravity level was difficult:





- For flights F06-F18, the absolute value was determined by a comparison against existing IceBridge gravity data (uncertainty of this levelling and the IceBridge gravity level itself is expected to be around 3 mGal).





- For flights F19-F23 and F25-F29, the absolute value was determined just using the IMU measurements, assuming that the temperature-corrected residual accelerometer biases were the same during the campaign (error of this assumption: approx 3 mGal).





The positions (lat/lon/height) refer to the centre of observations of the iMAR-RQH IMU (the intersection point of its three accelerometers).





The flights are now grouped by survey area (Recover, Slessor, Bailey = FISS).



NOTE there is no Support Force gravity as the sensor was not on-board.





The columns are:





1: Line or flight number



2: Date (YYYY/MM/DD)



3: Time (HH:MM:SS)



4: Latitude in degrees



5: Longitude in degrees



6: Elevation - Ellipsoidal Height (WGS84) in metres



7: Free Air anomaly [mGal] - Gravity disturbance w.r.t. GRS80 normal gravity [mGal]

Data collection:

The data were collected using an iMAR strapdown gravity system.

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b3e51c6e-20fd-4e3a-be47-0ed2efcaa0ab XML
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English
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UTF8
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Dataset
Hierarchy level name

dataset
Date stamp
2021-10-14
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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Keywords

Aerogeophysics Antarctica Gravity
GEMET - INSPIRE themes, version 1.0

Geology
Global Change Master Directory (GCMD) Science Keywords

EARTH SCIENCE > Solid Earth > Geodetics/Gravity EARTH SCIENCE > Solid Earth > Geodetics/Gravity > Gravity


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