b'Geophysics in the surveysNewsFigure 2.Free-air gravity map of Australia, 2019 (Free Air Anomaly Grid of Australia 2019, 400 m cell size. Geoscience Australia, Canberra. http://pid.geoscience.gov.au/dataset/ga/133023).the ground-based observations stored in the Australian NationalSouth West McArthur, Barkly Gravity Survey, 2019Gravity Database (ANGD) as of September 2019. These data have been acquired by the Commonwealth, State and TerritoryGeoscience Australias Exploring for the Future (EFTF) Governments, the mining and exploration industry, universitiesprogramme and Northern Territory Geological Survey (NTGS) and research organisations from the 1940s to the present day.are pleased to announce the release of newly acquired gravity Station spacing varies from approximately 11 km down to lessdata covering the South West McArthur (northern dark blue than 1 km, with major parts of the continent having stationhashed section in Figure 1). The survey infills existing 4 x 4 km spacing between 2.5 and 7 km. The ANGD contains over 1.8 milliongravity coverage to 2 x 2 km, over an area of 18 300 km2 with observations, of which nearly 1.4 million were considered suitable3303 new gravity stations. The survey supports GAs Tennant for inclusion in the calculation of this grid. The 2016 versions of theCreek-Mt Isa drilling programme to be undertaken at a later Australian National Gravity Grids were masked to the coastline. Indate, and NTGSs unlocking the Barkly Tablelands resource contrast, in 2019 we chose to supplement the onshore data withpotential. The dataset is available via GAs electronic catalogue: offshore data that were sourced from v28.1 of the Global Gravityhttps://ecat.ga.gov.au/geonetwork and will be incorporated grid developed using data from SIO, NOAA and NGA at Scrippsinto subsequent national compilations.Institution of Oceanography, University of California San Diego. This provides valuable context to the onshore ground gravity data.Geoscience Australias GADDSThis grid was produced by Geoscience Australia and GNS Science International Limited. Last but not least, GAs new Geophysical Archive Data Delivery System (GADDS) is set for initial release end of March 2020. When completed, the 2019 compilation will be the first time thatAlong with a more user-friendly GIS interface for grids (similar ground, marine, satellite and airborne data will have been mergedinterface as per the EFTF portal: https://portal.ga.gov.au/), there to provide the highest resolution, seamless stitch possible. are plans to add the ability to clip, ship and zip located and point data from GAs electronic catalogue.The Free Air Anomaly grid of the combined ground, marine andFor the moment, GADDS will continue to faithfully deliver satellite data is available for download via Geoscience Australiaslocated datasets for surveys archived before June 2019. For electronic catalogue: https://ecat.ga.gov.au/geonetwork.located survey data acquired afterwards, please contact GAs Additional products, including the Bouguer reduced datasetclient services (clientservices@ga.gov.au) or Mike Barlow and airborne data should follow in March. onmike.barlow@ga.gov.au.FEBRUARY 2020 PREVIEW 18'