b'Geophysics in the surveysNewswas applied to the merged radiometric grid, providing an additional dataset for radiometric interpretation\x08The elevation data package of two grid products, radar and laser DEMs are provided for completeness\x08All of the grid products were produced to be co-nodular (grid cells line up perfectly between datasets with no resampling during processing) were gridded and supplied in the coordinate system of the data capture: Geodetic GDA94\x08 Grid cell size is 0\x0800036 decimal degrees, equating to 40 metres (1/5th of the survey line spacing)\x08The merged GCAS grid products are now available in three packages (TMI, Radiometrics and DEM), including a fourth package containing the individual reprocessed radiometric located data and grids\x08Datasets can be downloaded via SARIG Figure 3.This ternary radiometric grid is one of the six grids in the radiometrics download package. (scroll down on the home page and click Gawler Craton Airborne Survey data releases to view the layers\x08 Once a layer is selected, click the Active Layers tab and use the downward pointing arrow to download the layer)\x08 The merged datasets can also be downloaded via the link under the map on energymining\x08sa\x08gov\x08au/minerals/gcas (see Figure 1)\x08 For assistance with downloading data sets, please contact Customer Services resources\x08customerservices@sa\x08gov\x08auThe GCAS team gratefully acknowledge Des Fitzgerald and Rainer Wackerle (Intrepid Geophysics) for assistance with scripts, Matthew Hutchens (now with GSNT) for QA/QC work, Mark Baigent (Baigent Geosciences) for QA/QC and post-processing work, Brian Minty (Minty Geophysics) for test range comparisons, Clive Foss (CSIRO) for producing the first set of TMI enhancements and depth-to-basement work (available in a separate download package), John Paine (Scientific Computing and Applications; WinDisp software) for valuable Figure 4.Both laser (displayed) and radar derived elevation models are provided in the GCAS elevationprogramming assistance, everyone at GA data package.who were involved in the GCAS project, and of course all the survey companies - The TMI data package containsThe radiometric data package of six gridGPX Surveys, MagSpec Airborne Surveys, a total of 22 TMI and filtered TMIproducts was produced after carefulSanders Geophysics, Thomson Airbornegrids - an unprecedented numberreprocessing of the raw data, ensuringwithout whom these data wouldnt exist\x08of additional filters and magneticsystem calibrations were applied tensor components to provide theconsistently across regions flown byLaz Katona, Gary Reed, Tim Keeping and most comprehensive set of magneticeach platform, and signal loss throughPhilip Heath transforms ever released by theprocessing was kept to a minimum\x08Geological Survey of South Australia Geological Survey of South Australia\x08 A new filter, piecewise normalisationLaz.Katona@sa.gov.au19 PREVIEW APRIL 2021'