Data

GSWA Lake Grace thorium grid geodetic

Name: GSWA Lake Grace thorium grid geodetic
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=a649f904-775e-419d-8b2e-360e69a56097&rft.title=GSWA Lake Grace thorium grid geodetic&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/142315&rft.description=This GSWA Lake Grace thorium grid geodetic is an airborne-derived radiometric thorium window countrate grid for the Lake Grace, WA, 1995 survey. 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 thorium (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.This GSWA Lake Grace thorium grid geodetic has a cell size of 0.00042 degrees (approximately 43m). The data are in units of counts per second (or cps). The data used to produce this grid was acquired in 1995 by the WA Government, and consisted of 4847 line-kilometres of data at 200m line spacing and 60m terrain clearance.Maintenance and Update Frequency: notPlannedStatement: This GSWA Lake Grace thorium grid geodetic is an airborne-derived radiometric thorium window countrate grid for the Lake Grace, WA, 1995 survey. The survey was acquired in 1995 under the project No. 1069 for the geological survey of WA. The data consisted of 4847 line-kilometres of data at 200m line spacing and 60m terrain clearance. The radiometric count rate is contaminated by background radiation contributions from the aircraft, cosmic rays, and the presence of Radon gas escaping from the ground. It is also affected by the ground clearance of the detector, as well as the volume of the detector. This grid was produced after applying radiometric corrections to the thorium window data from the survey. The final grid is checked for quality by GA geophysicists to ensure that the final data released are fit-for-purpose. This GSWA Lake Grace thorium grid geodetic has a cell size of 0.00042 degrees (approximately 43m) and shows the thorium window countrate of the Lake Grace, WA, 1995 survey in units of counts per second (or cps). 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. 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. References Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).&rft.creator=Geophysical Acquisition & Processing Section &rft.date=2020&rft.coverage=westlimit=118.258; southlimit=-33.1115; eastlimit=118.7218; northlimit=-32.9165; projection=GDA94 (EPSG:4283)&rft.coverage=westlimit=118.258; southlimit=-33.1115; eastlimit=118.7218; northlimit=-32.9165; projection=GDA94 (EPSG:4283)&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/&rft_rights=(c) State of Western Australia (Department of Mines, Industry Regulation and Safety) 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=WA&rft_subject=survey 1069&rft_subject=GADDS2.0&rft_subject=radiometrics&rft_subject=NASVD&rft_subject=thorium&rft_subject=window countrate&rft_subject=airborne digital data&rft_subject=geophysical survey&rft_subject=rad&rft_subject=Th&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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This GSWA Lake Grace thorium grid geodetic is an airborne-derived radiometric thorium window countrate grid for the Lake Grace, WA, 1995 survey. 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 thorium (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.
This GSWA Lake Grace thorium grid geodetic has a cell size of 0.00042 degrees (approximately 43m). The data are in units of counts per second (or cps). The data used to produce this grid was acquired in 1995 by the WA Government, and consisted of 4847 line-kilometres of data at 200m line spacing and 60m terrain clearance.

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Maintenance and Update Frequency: notPlanned

Statement: This GSWA Lake Grace thorium grid geodetic is an airborne-derived radiometric thorium window countrate grid for the Lake Grace, WA, 1995 survey. The survey was acquired in 1995 under the project No. 1069 for the geological survey of WA. The data consisted of 4847 line-kilometres of data at 200m line spacing and 60m terrain clearance. The radiometric count rate is contaminated by background radiation contributions from the aircraft, cosmic rays, and the presence of Radon gas escaping from the ground. It is also affected by the ground clearance of the detector, as well as the volume of the detector. This grid was produced after applying radiometric corrections to the thorium window data from the survey. The final grid is checked for quality by GA geophysicists to ensure that the final data released are fit-for-purpose. This GSWA Lake Grace thorium grid geodetic has a cell size of 0.00042 degrees (approximately 43m) and shows the thorium window countrate of the Lake Grace, WA, 1995 survey in units of counts per second (or cps). 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. 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. References Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).

Created: 07 03 2020

Issued: 07 03 2020

Modified: 06 07 2021

Data time period: 19 02 1995 to 21 02 1995

This dataset is part of a larger collection

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text: westlimit=118.258; southlimit=-33.1115; eastlimit=118.7218; northlimit=-32.9165; projection=GDA94 (EPSG:4283)

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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 GSWA Lake Grace thorium grid geodetic (GSWA Lake Grace thorium grid geodetic file download)

url : https://thredds.nci.org.au/thredds/fileServer/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/WA/grid/P1069/P1069-grid-th_wind.nc External Link

NetCDF Subsetting Service (NCSS) for GSWA Lake Grace thorium grid geodetic (GSWA Lake Grace thorium grid geodetic NCSS)

url : https://thredds.nci.org.au/thredds/ncss/grid/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/WA/grid/P1069/P1069-grid-th_wind.nc/dataset.html External Link

OPeNDAP web service for GSWA Lake Grace thorium grid geodetic (GSWA Lake Grace thorium grid geodetic OPeNDAP)

url : https://thredds.nci.org.au/thredds/dodsC/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/WA/grid/P1069/P1069-grid-th_wind.nc.html External Link

OGC Web Mapping Service (WMS) for GSWA Lake Grace thorium grid geodetic (GSWA Lake Grace thorium grid geodetic WMS)

url : https://thredds.nci.org.au/thredds/wms/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/WA/grid/P1069/P1069-grid-th_wind.nc?service=WMS&version=1.3.0&request=GetCapabilities External Link

OGC Web Coverage Service (WCS) for GSWA Lake Grace thorium grid geodetic (GSWA Lake Grace thorium grid geodetic WCS)

url : https://thredds.nci.org.au/thredds/wcs/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/WA/grid/P1069/P1069-grid-th_wind.nc?service=WCS&version=1.0.0&request=GetCapabilities External Link

GSWA Lake Grace thorium grid geodetic NCSS

GSWA Lake Grace thorium grid geodetic OPeNDAP