Database to provide descriptions and images of the Australian Fundamental Gravity Network (AFGN) stations to Gravity Surveyors and the general public. The Australian National Gravity Database (ANGD) is underpinned by the AFGN, which provides the datum for gravity surveys conducted throughout Australia. The AFGN is a network of permanently marked and documented gravity base stations which allow gravity surveys to tie their surveys to a consistent datum. Geoscience Australia maintains the Network with assistance in the form of updates from State and Territory Geological Surveys, Surveyors, and the general public. Geoscience Australia maintains the ANGD, which contains data from gravity surveys conducted throughout Australia and its Remote Offshore Territories. These data have been sourced from within Geoscience Australia, State and Territory governments and agencies, mineral and petroleum exploration companies, universities and overseas organisations.

Geodetic Calculations - Vincenty's Formulae, Inverse Method Given latitude and longitude of two points, calculate the ellipsoidal distance and forward and reverse azimuths between the points.

The national AUSGeoid09 grid file, state files and 1:250,000 map sheet files can be downloaded from Geoscience Australia's ftp server. These files can be used to compute AHD heights in real time when used in Real Time Kinematic GNSS receivers.

The k index is a quasilogarithmic index of geomagnetic activity relative to an assumed quiet day curve for the recording site. k is a code from 0-9 that characterizes magnetic activity (0 being the least active field and 9 the most active field) over a 3 hour period.

OCCAM VLBI Processing Software FTP site Geodetic Very Long Baseline Interferometry (VLBI) observations provided the first direct confirmation of tectonic plate motion at the end of the 1980s. Now VLBI observations measure the motions of stations with accuracy better than 1mm/year together with other space geodetic techniques such as Global Positioning System (GPS) and Satellite Laser Ranging (SLR) Analysis.

Minute Values Request Form

This application provides quick-look images and download options of the MOD43 Nadir BRDF-Adjusted Reflectance (NBAR) Products generated by ACRES. These products are a composite, generated for MODIS spectral bands 1-7 at the mean solar zenith angle over a 16 day period. In addition to the NBAR composite products, the BRDF parameters for each band, the ancillary, and band quality information are also provided. Each NBAR composite product is in GeoTIFF format at 500 metres resolution. All of the files are compressed using gzip/tar as "*.tar.gz". For Windows gzip/tar support please try WinZip.

Redfearne's Formulae Excel spreadsheet

Digital elevation data which describes Australia's landforms and seabed is crucial for addressing issues relating to the impacts of climate change, disaster management, water security, environmental management, urban planning and infrastructure design. The National Elevation Data Framework (NEDF) vision is to ensure that decision makers, investors and the community have access to the best available elevation data to address the needs of today and the decades ahead.

This application allows the user to guess what cities are indicated by the satellite images.