b'Geophysics in the surveysNewsAusAEM2 release GAs inversion uses an in-house sample-by- Referencessample layered-earth (1D) approach, which The decision was made to suspendis a deterministic regularised gradient- Brodie, R.C., 2016. GA-AEM Source Code AusAEM2 in March of this year, underbased algorithm that we call GALEISBSRepository, https://github.com/the current contract framework,(Brodie, 2016). The process simultaneouslyGeoscienceAustralia/gaaemdespite the survey being onlyinverts the vector sum of measured X- andLey-Cooper A. Y.,R.C. Brodie, and72% complete, or having flownZ-component data to produce a singleM.Richardson., 2019, AusAEM: approximately 52 000 line kmsmooth layered conductivity model.Australias airborne electromagnetic of the proposed 73 000 line kmThe inversion is initially tuned for datacontinental-scale acquisition program. programme (Figure 2). The locatedQC purposes, but is then re-seeded forExploration Geophysics, 51, (1), 1-10, ddata, contractor inversions and GAsinterpretation for either groundwateroi.10.1080/08123985.2019.1694393.inversions were publically released(shallow lateral enhancement) or mineral last month, and can be downloaded(deeper contrasts) applications. MoreMike Barlow via GAs electronic catalogue system:details can be found at Brodie 2016 andGeoscience Australia https://ecat.ga.gov.au/geonetwork/. Ley-Cooper et al, 2019. Mike.Barlow@ga.gov.auFigure 2.AusAEM 1 & 2 coverage over Northern Australia, 2020. Background image: 1:1 million scale Surface Geology of Australia underlain by magnetics (greyscale, 0.5 vertical derivative of total magnetic intensity).AUGUST 2020 PREVIEW 16'