Authors / CoAuthors
Geophysical Acquisition & Processing Section
Abstract
The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. The terrestrial dose rate grid is derived as a linear combination of the filtered K, U and Th grids. A low pass filter is applied to this grid to generate the filtered terrestrial dose rate grid. This NT P1268 Dunmarra Doserate Grid Geodetic has a cell size of 0.00083 degrees (approximately 91m) and shows the terrestrial dose rate of the Dunmarra, NT, 2014. The data used to produce this grid was acquired in 2014 by the NT Government, and consisted of 104017 line-kilometres of data at 400m line spacing and 80m terrain clearance.
Product Type
dataset
eCat Id
143579
Contact for the resource
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
- theme.ANZRC Fields of Research.rdf
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- EARTH SCIENCES
- ( Data centre )
-
- NCI
- ( Discipline )
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- Earth sciences
- ( Discipline )
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- geophysics
- ( Feature type )
-
- grid
- ( Place )
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- Australia
- ( Place )
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- NT
- ( Project )
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- survey 1268
- ( Theme )
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- GADDS2.0
- ( Theme )
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- radiometrics
- ( Theme )
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- NASVD
- ( Theme )
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- thorium
- ( Theme )
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- uranium
- ( Theme )
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- potassium
- ( Theme )
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- dose rate
- ( Theme )
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- dose
- ( Theme )
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- rate
- ( Theme )
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- airborne digital data
- ( Theme )
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- geophysical survey
- ( Theme )
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- rad
- ( Theme )
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- K
- ( Theme )
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- Th
- ( Theme )
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- U
- ( Theme )
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- gamma-ray
- ( Theme )
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- spectrometry
- ( Theme )
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- raster
- ( Theme )
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- grid
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- Published_External
Publication Date
2020-03-07T00:00:00
Creation Date
2020-03-07T00:00:00
Security Constraints
Legal Constraints
Status
completed
Purpose
Maintenance Information
notPlanned
Topic Category
geoscientificInformation
Series Information
Lineage
This NT P1268 Dunmarra Doserate Grid Geodetic is an airborne-derived radiometric terrestrial dose rate grid for the Dunmarra, NT, 2014 survey. The survey was acquired under the project No. 1268 for the geological survey of NT. The grid has a cell size of 0.00083 degrees (approximately 91m). A total of 104017 line-kilometres of data at a line spacing of 400m were acquired to produce this grid. The terrestrial dose rate grid is derived as a linear combination of the filtered K, U and Th grids. Details of the specifications of individual airborne surveys can be found in the Fourteenth Edition of the Index of Airborne Geophysical Surveys (Percival, 2014). This Index is also available online at http://pid.geoscience.gov.au/dataset/79134. Reference: Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).
Parent Information
Geophysical Data Collection - Airborne Geophysics
UUID - ddeb0fc4-32e3-4913-80f2-f4249b17a925,
eCat ID - 111301
Extents
[-18.0265, -14.4729, 131.9785, 134.0227]
Reference System
GDA94 (EPSG:4283)
Spatial Resolution
Service Information
Associations
Downloads and Links
Source Information
This NT P1268 Dunmarra Doserate Grid Geodetic includes airborne-derived radiometric terrestrial dose data for the Dunmarra, NT, 2014 survey acquired for the geological survey of NT