Data

Tallaringa South - dose rate grid (AWAGS)

Name: Tallaringa South - dose rate grid (AWAGS)
Published: 2020

Geoscience Australia

Geophysical Acquisition & Processing Section

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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://rhe-ecat-prod01.prod.lan:8080/geonetwork/srv/eng/search?uuid=1bca3f52-37ee-4200-a4ab-9b620855e723&rft.title=Tallaringa South - dose rate grid (AWAGS)&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/145056&rft.description=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 total dose rate is due to natural sources of radiation and is computed by adding estimates of cosmic dose at ground level to the terrestrial dose. 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 total dose rate grid.This Tallaringa South - dose rate grid (AWAGS) has a cell size of 0.0004 degrees (approximately 42m) and shows the total dose rate of the Tallaringa South Airborne Magnetic Radiometric and DEM Survey, SA, 2017 survey. The data used to produce this grid was acquired in 2017 by the SA Government, and consisted of 146285 line-kilometres of data at 200m line spacing and 60m terrain clearance.Maintenance and Update Frequency: notPlannedStatement: This Tallaringa South - dose rate grid (AWAGS) is an airborne-derived radiometric total dose rate grid for the Tallaringa South Airborne Magnetic Radiometric and DEM Survey, SA, 2017 survey. The survey was acquired under the project No. 1298 for the geological survey of SA. The grid has a cell size of 0.0004 degrees (approximately 42m). A total of 146285 line-kilometres of data at a line spacing of 200m were acquired to produce this grid. The total dose rate is due to natural sources of radiation and is computed by adding estimates of cosmic dose at ground level to the terrestrial dose. Noise-adjusted singular value decomposition (NASVD) has been applied to the data. NASVD is a spectral component analysis procedure for the removal of noise from gamma-ray spectra. The terrestrial dose 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).&rft.creator=Geophysical Acquisition & Processing Section &rft.date=2020&rft.coverage=westlimit=130.99; southlimit=-30.5046; eastlimit=133.5104; northlimit=-29.4958; projection=GDA94 (EPSG:4283)&rft.coverage=westlimit=130.99; southlimit=-30.5046; eastlimit=133.5104; northlimit=-29.4958; projection=GDA94 (EPSG:4283)&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/&rft_rights=(c) Commonwealth of Australia (Geoscience Australia) and Department for Energy and Mining, Government of South Australia 2020&rft_rights=Australian Government Security ClassificationSystem https://www.protectivesecurity.gov.au/Pages/default.aspx&rft_subject=geoscientificInformation&rft_subject=EARTH SCIENCES&rft_subject=NCI&rft_subject=Earth sciences&rft_subject=geophysics&rft_subject=grid&rft_subject=Australia&rft_subject=SA&rft_subject=survey 1298&rft_subject=GADDS2.0&rft_subject=radiometrics&rft_subject=NASVD&rft_subject=thorium&rft_subject=uranium&rft_subject=potassium&rft_subject=dose rate&rft_subject=total dose&rft_subject=rate&rft_subject=airborne digital data&rft_subject=geophysical survey&rft_subject=rad&rft_subject=K&rft_subject=Th&rft_subject=U&rft_subject=gamma-ray&rft_subject=spectrometry&rft_subject=raster&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data

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(c) Commonwealth of Australia (Geoscience Australia) and Department for Energy and Mining, Government of South Australia 2020

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Full description

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 total dose rate is due to natural sources of radiation and is computed by adding estimates of cosmic dose at ground level to the terrestrial dose. 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 total dose rate grid.
This Tallaringa South - dose rate grid (AWAGS) has a cell size of 0.0004 degrees (approximately 42m) and shows the total dose rate of the Tallaringa South Airborne Magnetic Radiometric and DEM Survey, SA, 2017 survey. The data used to produce this grid was acquired in 2017 by the SA Government, and consisted of 146285 line-kilometres of data at 200m line spacing and 60m terrain clearance.

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Maintenance and Update Frequency: notPlanned

Statement: This Tallaringa South - dose rate grid (AWAGS) is an airborne-derived radiometric total dose rate grid for the Tallaringa South Airborne Magnetic Radiometric and DEM Survey, SA, 2017 survey. The survey was acquired under the project No. 1298 for the geological survey of SA. The grid has a cell size of 0.0004 degrees (approximately 42m). A total of 146285 line-kilometres of data at a line spacing of 200m were acquired to produce this grid. The total dose rate is due to natural sources of radiation and is computed by adding estimates of cosmic dose at ground level to the terrestrial dose. Noise-adjusted singular value decomposition (NASVD) has been applied to the data. NASVD is a spectral component analysis procedure for the removal of noise from gamma-ray spectra. The terrestrial dose 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).

Created: 31 10 2020

Issued: 31 10 2020

Modified: 05 07 2021

Data time period: 26 09 2017 to 12 05 2018

This dataset is part of a larger collection

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text: westlimit=130.99; southlimit=-30.5046; eastlimit=133.5104; northlimit=-29.4958; projection=GDA94 (EPSG:4283)

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Other Information

The Geophysical Archive Data Delivery System (GADDS2) portal provides HTTP download of geophysics datasets in a number of formats. Point and line datasets are available in NetCDF and ASEG-GDF2. Grid datasets are available in NetCDF, GeoTIFF and ERS. (File available for download in various formats from the GADDS2 portal)

url : https://portal.ga.gov.au/persona/gadds External Link

File download for Tallaringa South - dose rate grid (AWAGS) (Tallaringa South - dose rate grid (AWAGS) file download)

url : https://thredds.nci.org.au/thredds/fileServer/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/grid/P1298/P1298-grid-dose_total-AWAGS_RAD_2019.nc External Link

NetCDF Subsetting Service (NCSS) for Tallaringa South - dose rate grid (AWAGS) (Tallaringa South - dose rate grid (AWAGS) NCSS)

url : https://thredds.nci.org.au/thredds/ncss/grid/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/grid/P1298/P1298-grid-dose_total-AWAGS_RAD_2019.nc/dataset.html External Link

OPeNDAP web service for Tallaringa South - dose rate grid (AWAGS) (Tallaringa South - dose rate grid (AWAGS) OPeNDAP)

url : https://thredds.nci.org.au/thredds/dodsC/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/grid/P1298/P1298-grid-dose_total-AWAGS_RAD_2019.nc.html External Link

OGC Web Mapping Service (WMS) for Tallaringa South - dose rate grid (AWAGS) (Tallaringa South - dose rate grid (AWAGS) WMS)

url : https://thredds.nci.org.au/thredds/wms/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/grid/P1298/P1298-grid-dose_total-AWAGS_RAD_2019.nc?service=WMS&version=1.3.0&request=GetCapabilities External Link

OGC Web Coverage Service (WCS) for Tallaringa South - dose rate grid (AWAGS) (Tallaringa South - dose rate grid (AWAGS) WCS)

url : https://thredds.nci.org.au/thredds/wcs/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/grid/P1298/P1298-grid-dose_total-AWAGS_RAD_2019.nc?service=WCS&version=1.0.0&request=GetCapabilities External Link

Tallaringa South - dose rate grid (AWAGS) NCSS

Tallaringa South - dose rate grid (AWAGS) OPeNDAP

Tallaringa South - dose rate grid (AWAGS) WMS

Tallaringa South - dose rate grid (AWAGS) WCS

Identifiers

URL : pid.geoscience.gov.au/dataset/ga/145056
global : 1bca3f52-37ee-4200-a4ab-9b620855e723