Data

NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um

Name: NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um
Published: 2023

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=info:doi10.26186/149433&rft.title=NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um&rft.identifier=10.26186/149433&rft.publisher=Commonwealth of Australia (Geoscience Australia)&rft.description=Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. 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 NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the NTGS Pedirka Gravity Survey (P202381). This gravity survey was acquired under the project No. 202381 for the geological survey of NT. The grid has a cell size of 0.00944 degrees (approximately 1000m). A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. A total of 11443 gravity stations at a spacing between 2000m and 4000m were acquired to produce this grid.Maintenance and Update Frequency: notPlannedStatement: This NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the NTGS Pedirka Gravity Survey (P202381). This gravity survey was acquired under the project No. 202381 for the geological survey of NT. The grid has a cell size of 0.00944 degrees (approximately 1000m). A total of 11443 gravity stations at a spacing between 2000m and 4000m were acquired to produce this grid. Three processes are required to correct the gravity observations for the effects of the surrounding topography: (1) a Bouguer correction (Bullard A), which approximates the topography as an infinite horizontal slab; (2) a correction to that horizontal slab for the curvature of the Earth (Bullard B); and (3) a terrain correction (Bullard C), which accounts for the undulations of the surrounding topography. The complete spherical cap Bouguer gravity anomalies were calculated by applying terrain correction (Bullard C) to the spherical cap Bouguer anomaly point data of NTGS Pedirka Gravity Survey (P202381). These terrain corrections were calculated using software from INTREPID Geophysics. The Intrepid algorithm utilises concentric rings subdivided into cells (Direen, 2001) to calculate the terrain correction. The terrain corrected data were then gridded using a gridding technique provided by the INTREPID Geophysics software package. A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the Bouguer gravity grid of the NTGS Pedirka Gravity Survey (P202381) survey to produce this grid. This grid was calculated using an algorithm from the INTREPID Geophysics software package. The processed data are checked by GA geophysicists using standard methods for assessing quality to ensure that the final data are fit-for-purpose. Details of the specifications of individual surveys held in the Australian National Gravity Database (ANGD) can be found in the Second Edition of the Index of Gravity Surveys (Wynne and Bacchin, 2009). References: Intrepid Geophysics, http://www.intrepid-geophysics.com; Wynne, P. and Bacchin, M., 2009. Index of Gravity Surveys (Second Edition). Geoscience Australia, Record 2009/07.&rft.creator=Geophysical Acquisition & Processing Section &rft.date=2023&rft.coverage=westlimit=133.9556537185314; southlimit=-26.063728883255862; eastlimit=138.08963158704248; northlimit=-24.05336978281555; projection=GDA94 (EPSG:4283)&rft.coverage=westlimit=133.9556537185314; southlimit=-26.063728883255862; eastlimit=138.08963158704248; northlimit=-24.05336978281555; projection=GDA94 (EPSG:4283)&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/&rft_rights=Commonwealth of Australia (Geoscience Australia) and Northern Territory of Australia (Northern Territory Geological Survey) 2023&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=NT&rft_subject=survey 202381&rft_subject=GADDS2.0&rft_subject=gravity&rft_subject=spherical cap&rft_subject=Bouguer&rft_subject=complete&rft_subject=1VD&rft_subject=first vertical derivative&rft_subject=ground digital data&rft_subject=geophysical survey&rft_subject=grav&rft_subject=raster&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data

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Creative Commons Attribution 4.0 International Licence
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Commonwealth of Australia (Geoscience Australia) and Northern Territory of Australia (Northern Territory Geological Survey) 2023

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Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. 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 NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the NTGS Pedirka Gravity Survey (P202381). This gravity survey was acquired under the project No. 202381 for the geological survey of NT. The grid has a cell size of 0.00944 degrees (approximately 1000m). A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. A total of 11443 gravity stations at a spacing between 2000m and 4000m were acquired to produce this grid.

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Maintenance and Update Frequency: notPlanned

Statement: This NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the NTGS Pedirka Gravity Survey (P202381). This gravity survey was acquired under the project No. 202381 for the geological survey of NT. The grid has a cell size of 0.00944 degrees (approximately 1000m). A total of 11443 gravity stations at a spacing between 2000m and 4000m were acquired to produce this grid. Three processes are required to correct the gravity observations for the effects of the surrounding topography: (1) a Bouguer correction (Bullard A), which approximates the topography as an infinite horizontal slab; (2) a correction to that horizontal slab for the curvature of the Earth (Bullard B); and (3) a terrain correction (Bullard C), which accounts for the undulations of the surrounding topography. The complete spherical cap Bouguer gravity anomalies were calculated by applying terrain correction (Bullard C) to the spherical cap Bouguer anomaly point data of NTGS Pedirka Gravity Survey (P202381). These terrain corrections were calculated using software from INTREPID Geophysics. The Intrepid algorithm utilises concentric rings subdivided into cells (Direen, 2001) to calculate the terrain correction. The terrain corrected data were then gridded using a gridding technique provided by the INTREPID Geophysics software package. A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the Bouguer gravity grid of the NTGS Pedirka Gravity Survey (P202381) survey to produce this grid. This grid was calculated using an algorithm from the INTREPID Geophysics software package. The processed data are checked by GA geophysicists using standard methods for assessing quality to ensure that the final data are fit-for-purpose. Details of the specifications of individual surveys held in the Australian National Gravity Database (ANGD) can be found in the Second Edition of the Index of Gravity Surveys (Wynne and Bacchin, 2009). References: Intrepid Geophysics, http://www.intrepid-geophysics.com; Wynne, P. and Bacchin, M., 2009. Index of Gravity Surveys (Second Edition). Geoscience Australia, Record 2009/07.

Notes

Purpose
The Pedirka gravimetric survey was carried out as part of the exploration for the future (EFTF) program as a collaboration between the Northern Territory Geological Survey (NTGS) and Geoscience Australia. This survey forms part of the NTGS’s Resourcing the Territory Initiative, which aims to support resource exploration in the NT.

Created: 04 10 2023

Issued: 04 10 2023

Modified: 12 04 2024

Data time period: 30 05 2023 to 08 09 2023

This dataset is part of a larger collection

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text: westlimit=133.9556537185314; southlimit=-26.063728883255862; eastlimit=138.08963158704248; northlimit=-24.05336978281555; 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 NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um (NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um file download)

url : https://thredds.nci.org.au/thredds/fileServer/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/NT/grid/P202381/202381_Pedirka_Gravity_CSCBA267GU_1VD.nc External Link

NetCDF Subsetting Service (NCSS) for NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um (NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um NCSS)

url : https://thredds.nci.org.au/thredds/ncss/grid/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/NT/grid/P202381/202381_Pedirka_Gravity_CSCBA267GU_1VD.nc/dataset.html External Link

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url : https://thredds.nci.org.au/thredds/dodsC/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/NT/grid/P202381/202381_Pedirka_Gravity_CSCBA267GU_1VD.nc.html External Link

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url : https://thredds.nci.org.au/thredds/wms/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/NT/grid/P202381/202381_Pedirka_Gravity_CSCBA267GU_1VD.nc?service=WMS&version=1.3.0&request=GetCapabilities External Link

OGC Web Coverage Service (WCS) for NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um (NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um WCS)

url : https://thredds.nci.org.au/thredds/wcs/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/NT/grid/P202381/202381_Pedirka_Gravity_CSCBA267GU_1VD.nc?service=WCS&version=1.0.0&request=GetCapabilities External Link

NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um NCSS

NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um OPeNDAP

NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um WMS

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Identifiers

DOI : 10.26186/149433
global : 05d93f8b-5db2-4028-9c9a-4ad96b05985e