Strapdown aerogravity survey across the Brunt Ice Shelf, 2017

This data set contains strapdown aerogravity data collected during an airborne radar survey of the Brunt Ice Shelf as part of the NERC/BAS Life Time of Halley project. Unlike traditional stabilised platform gravity surveys strapdown gravity techniques, using an Inertial Measurement Unit (IMU) rigidly attached to the aircraft as the sensor, allow collection of gravity data during draped or turbulent flight. This was a key factor allowing for data collection during a dedicated radar survey. The survey was flown draped with an average height above the ice surface of 420m, and includes 4716 km of new data. The aircraft used was the BAS aerogeophysicaly equipped twin otter VP-FBL. Data are available in both Geosoft database (.gdb) and ASCII file formats (.xyz).

Simple

Alternate title
Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01073
Date (Publication)
2018-05-04
Identifier
http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01073
Custodian
  British Antarctic Survey
High Cross, Madingley Road , Cambridge , CB3 0ET , UK
+44 (0)1223 221400
Originator
  Polar Data Centre, Natural Environment Research Council, UK Research & Innovation, UK - Becker, D., Jordan, T., Corr, H., & Robinson, C.
High Cross, Madingley , Cambridge , CB3 0ET , UK
+44 (0)1223 221400
Maintenance and update frequency
unknown Unknown
Keywords
  • NDGO0001
NERC OAI Harvesting
  • NERC_DDC
GCMD Parameter Valids
  • EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glaciers
  • EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Ice Sheets
  • EARTH SCIENCE > Solid Earth > Geodetics/Gravity > Gravity
BAS Free-text keywords
  • Antarctica
  • Brunt Ice Shelf
  • Coats Land
  • Geophysics
  • Gravity
  • Strapdown
Use limitation

This data is covered by a UK Open Government Licence (http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/). Further by downloading this data the user acknowledges that they agree with the NERC data policy (http://www.nerc.ac.uk/research/sites/data/policy.asp), and the following conditions:

1. To cite both the data and literature reference in any publication as follows:

DATA REFERENCE

Becker, D., Jordan, T., Corr, H. & Robinson, C. "Strapdown aerogravity survey across the Brunt Ice Shelf, 2017" (2018) Polar Data Centre, Natural Environment Research Council, UK Research & Innovation, UK, doi:10.5285/79e63097-f5dc-41ff-8ca5-36bc4f95a6ff

LITERATURE REFERENCE

Jordan and Becker 2018 In prep.

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.
Access constraints
otherRestrictions Other restrictions
Other constraints

This data is covered by a UK Open Government Licence (http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/). Further by downloading this data the user acknowledges that they agree with the NERC data policy (http://www.nerc.ac.uk/research/sites/data/policy.asp), and the following conditions:

1. To cite both the data and literature reference in any publication as follows:

DATA REFERENCE

Becker, D., Jordan, T., Corr, H. & Robinson, C. "Strapdown aerogravity survey across the Brunt Ice Shelf, 2017" (2018) Polar Data Centre, Natural Environment Research Council, UK Research & Innovation, UK, doi:10.5285/79e63097-f5dc-41ff-8ca5-36bc4f95a6ff

LITERATURE REFERENCE

Jordan and Becker 2018 In prep.

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.
Metadata language
EnglishEnglish
Topic category
  • Climatology, meteorology, atmosphere
  • Geoscientific information
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Begin date
2017-01-09
End date
2017-01-14
Reference system identifier
OGP / urn:ogc:def:crs:EPSG::4326
Distribution format
Distributor
  Polar Data Centre - British Antarctic Survey
+44 (0)1223 221400
Protocol
http
Name
GET DATA
Function
download Download
Hierarchy level
dataset Dataset

Domain consistency

Measure identification
INSPIRE / Conformity_001

Conformance result

Date
Explanation
See the referenced specification
Pass
No
Statement

The standard deviation of the strapdown gravity crossover errors for the 2017 season was 2.5 mGal, consistent with a Route Mean Square Error (RMSE) of 1.8 mGal. The estimated GPS positional errors were 7.1 cm in the vertical and 3.1 cm in the horizontal.

Resolution: The line spacing for the main survey area is 5km, with regional lines spaced ~18 km apart. The optimum along track resolution of the strapdown gravity system is approximately 100 seconds, consistent with a full wavelength spatial resolution for the 2017 Brunt survey of ~6 km (at an aircraft speed of approximately 60 m/s).
File identifier
GB_NERC_BAS_PDC_01073 XML
Metadata language
EnglishEnglish
Hierarchy level
dataset Dataset
Date stamp
2018-05-04
Metadata standard name
NERC profile of ISO19115:2003
Metadata standard version
1.0
Point of contact
  British Antarctic Survey
+44 (0)1223 221400
Dataset URI
http://www.antarctica.ac.uk/dms/metadata.php?id=GB/NERC/BAS/PDC/01073
 
 

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