Data

GSWA Merredin Bruce Rock North Total Count Grid Geodetic

Geoscience Australia
Geophysical Acquisition & Processing Section
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://pid.geoscience.gov.au/dataset/ga/142365&rft.title=GSWA Merredin Bruce Rock North Total Count Grid Geodetic&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/142365&rft.description=This GSWA Merredin Bruce Rock North Total Count Grid Geodetic is an airborne-derived radiometric total count window countrate grid for the Merredin-Bruce Rock, WA, 1997 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 total count (K), total count (U) and total count (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 Merredin Bruce Rock North Total Count Grid Geodetic has a cell size of 0.0005 degrees (approximately 51m). The data are in units of counts per second (cps). The data used to produce this grid was acquired in 1997 by the WA Government, and consisted of 27533 line-kilometres of data at 150m line spacing and 50m terrain clearance.Maintenance and Update Frequency: notPlannedStatement: This GSWA Merredin Bruce Rock North Total Count Grid Geodetic is an airborne-derived radiometric total count window countrate grid for the Merredin-Bruce Rock, WA, 1997 survey. The survey was acquired in 1997 under the project No. 1064 for the geological survey of WA. The data consisted of 27533 line-kilometres of data at 150m line spacing and 50m 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 total count window data from the survey. 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 final grid is checked for quality by GA geophysicists to ensure that the final data released are fit-for-purpose. This GSWA Merredin Bruce Rock North Total Count Grid Geodetic has a cell size of 0.0005 degrees (approximately 51m) and shows the total count window countrate of the Merredin-Bruce Rock, WA, 1997 survey in units of counts per second (or cps). 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=117.7385; southlimit=-31.7723; eastlimit=118.273; northlimit=-31.1273; projection=GDA94 (EPSG:4283)&rft.coverage=westlimit=117.7385; southlimit=-31.7723; eastlimit=118.273; northlimit=-31.1273; 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 1064&rft_subject=GADDS2.0&rft_subject=radiometrics&rft_subject=NASVD&rft_subject=total count&rft_subject=window countrate&rft_subject=airborne digital data&rft_subject=geophysical survey&rft_subject=rad&rft_subject=TC&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) State of Western Australia (Department of Mines, Industry Regulation and Safety) 2020

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Brief description

This GSWA Merredin Bruce Rock North Total Count Grid Geodetic is an airborne-derived radiometric total count window countrate grid for the Merredin-Bruce Rock, WA, 1997 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 total count (K), total count (U) and total count (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 Merredin Bruce Rock North Total Count Grid Geodetic has a cell size of 0.0005 degrees (approximately 51m). The data are in units of counts per second (cps). The data used to produce this grid was acquired in 1997 by the WA Government, and consisted of 27533 line-kilometres of data at 150m line spacing and 50m terrain clearance.

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Maintenance and Update Frequency: notPlanned
Statement: This GSWA Merredin Bruce Rock North Total Count Grid Geodetic is an airborne-derived radiometric total count window countrate grid for the Merredin-Bruce Rock, WA, 1997 survey. The survey was acquired in 1997 under the project No. 1064 for the geological survey of WA. The data consisted of 27533 line-kilometres of data at 150m line spacing and 50m 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 total count window data from the survey. 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 final grid is checked for quality by GA geophysicists to ensure that the final data released are fit-for-purpose. This GSWA Merredin Bruce Rock North Total Count Grid Geodetic has a cell size of 0.0005 degrees (approximately 51m) and shows the total count window countrate of the Merredin-Bruce Rock, WA, 1997 survey in units of counts per second (or cps). 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: 06 11 1997 to 23 11 1997

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118.273,-31.1273 118.273,-31.7723 117.7385,-31.7723 117.7385,-31.1273 118.273,-31.1273

118.00575,-31.4498

text: westlimit=117.7385; southlimit=-31.7723; eastlimit=118.273; northlimit=-31.1273; projection=GDA94 (EPSG:4283)

Subjects
Australia | EARTH SCIENCES | Earth sciences | GADDS2.0 | NASVD | NCI | Published_External | TC | WA | airborne digital data | gamma-ray | geophysical survey | geophysics | geoscientificInformation | grid | rad | radiometrics | raster | spectrometry | survey 1064 | total count | window countrate |

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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)

uri : https://portal.ga.gov.au/persona/gadds

GSWA Merredin Bruce Rock North Total Count Grid Geodetic NCSS

uri : https://thredds.nci.org.au/thredds/ncss/grid/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/WA/grid/P1064/P1064-grid-tc_wind-North.nc/dataset.html

GSWA Merredin Bruce Rock North Total Count Grid Geodetic OPeNDAP

uri : https://thredds.nci.org.au/thredds/dodsC/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/WA/grid/P1064/P1064-grid-tc_wind-North.nc.html

GSWA Merredin Bruce Rock North Total Count Grid Geodetic WMS

uri : https://thredds.nci.org.au/thredds/wms/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/WA/grid/P1064/P1064-grid-tc_wind-North.nc?service=WMS&version=1.3.0&request=GetCapabilities

GSWA Merredin Bruce Rock North Total Count Grid Geodetic WCS

uri : https://thredds.nci.org.au/thredds/wcs/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/WA/grid/P1064/P1064-grid-tc_wind-North.nc?service=WCS&version=1.0.0&request=GetCapabilities

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