remote sensing
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Archived imagery
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Legacy product - no abstract available
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Validation of spectral remote sensing data for geological mapping and detection of hydrothermal footprints in the Mount Isa Inlier
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The Advanced Land Observing Satellite (ALOS) was launched on January 24th, 2006 by the Japan Aerospace Exploration Agency (JAXA) in a Sun-synchronous orbit. It carries three remote sensing instruments: Advanced Visible and Near Infrared Radiometer type-2 (AVNIR-2), Panchromatic Remote-sensing Instrument for Stereo Mapping (PRISM) and Phased Array type L-band Synthetic Aperture Radar (PALSAR). The PRISM sensor consists of three sets of telescopes for forward, nadir and backward viewing with each telescope providing 2.5 metre spatial resolution. These specifications facilitate generation of precise Digital Surface Models (DSMs) with accuracy sufficient for 1:25 000 scale maps. Geoscience Australia (GA) has been acquiring ALOS data since early 2006 and holds an extensive archive of PRISM images over Australia and New Zealand that are suitable for DSMs generation
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The purpose of this paper is to investigate and quantify the near-field and far-field contamination effects from GRACE data to assess whether or not they influence the accuracy with which hydrological signals in the Murray-Darling Basin, southeast Australia can be estimated. Far-field contamination was assessed by modelling some of the world's largest geophysical processes which generate major gravitational signals (e.g. melting of the Greenland icesheet, hydrology in the Amazon Basin) while near-field contamination was modelled by simulating gravitational variability of the Australian continent. Contamination was measured by simulating each of the processes and measuring the proportion of the simulated signal detected in the Murray - Darling Basin. The sum of the cumulative near-field and far-field effects revealed a maximum of ~10 mm (equivalent water height) of spurious signal within the Murray - Darling Basin. This equates to only one quarter of the formal uncertainty of the basin-scale estimates of changes in total water storage. Thus, GRACE products can be used to monitor broad scale hydrologic trends and variability in the Murray-Darling Basin without the need to account for contamination of the estimates from external geophysical sources.
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This CCT format specification follows the format coding conventions defined in the document " SAR DATA PRODUCTS FORMAT STANDARD Rev 2.0 10 March 1989 by CEOS SAR Data Standards Subgroup ". To improve compatibility between different installations, certain conventions have been used for the specification of the data formats on the CCT.