From 1 - 10 / 66
  • International Quiet Days (IQD's) are the days where the geomagnetic variations are a minimum in each month. International Disturbed Days (IDD's) are 5 days in each month where the geomagnetic variations are maximum. The classification of days is relative only to the month of calculation. The average disturbance level in one month may differ from another.

  • Minute Values Request Form

  • 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 - Redfearn's Formulae, Geographic to Grid Given Latitude and Longitude, calculate Easting, Northing, Zone for a Universal Transverse Mercator (UTM) projection, Grid convergence and Point Scale Factor.

  • ALOS Group Purchase is a new facility provided by ACRES for various approved customers/agencies to access the same ALOS data over a common area using ACRES online ordering.

  • AUSPOS provides users with the facility to submit dual frequency geodetic quality GPS RINEX data observed in a 'static' mode, to our GPS processing system and receive rapid turn-around Geocentric Datum of Australia (GDA) and International Terrestrial Reference Frame (ITRF) coordinates.

  • 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.

  • Interactive application of Geoscience Australia's Australia through time poster, which gives a brief overview of Australia's geological history, featuring the geological timescale and paleogeograpgy of the continents.

  • Using data from the six Australian continental magnetic observatories, a contour display of the rate-of-change of magnetic total intensity, F, over the continent is shown below. This provides a broad view of how F changes across Australia. The units shown on the contours are in nanoTesla per hour. The grey squares indicate the locations of the magnetic observatories. Both real-time and historic data can be displayed in this format. All maps are generated from a period of 15 minutes of observatory data and available at 15 minute intervals.

  • This application allows the user to see a `real-time' representation of the Earth from a satellite that is currently orbiting our planet. The satellite database that provides the positioning information is updated regularly, but may not reflect the current position of satellites that manoeuvre frequently after reaching orbit.