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Airborne Gravity Survey

18th September 2020
We are contacting you to share information in regards to an airborne gravity survey being undertaken by Geoscience Australia and the Government of South Australia as works are expected to occur within the airspace above your council area.

The Australian Vertical Working Surface (AVWS) is a new reference surface for heights in Australia based on the Earth’s gravity field.

As part of an ongoing improvement process, the Government of South Australia is partnering with Geoscience Australia (GA) to undertake an airborne gravity survey over Adelaide and surrounding regional areas from late 2020 to collect new gravity data.

The survey will involve a fixed-wing plane flying in public airspace along straight paths 1 to 2 km apart. In order to obtain the required accuracy, this plane will fly at a height no lower than 1,000 feet (300 m) in built-up urban areas and 500 feet (150 m) in rural areas.

Noise levels on the ground will be less than the sound of a passing motorbike, and will last for about the same amount of time. We would also like to reassure you that the plane and on-board instruments will not affect people or animals as they do not emit any signals, and will not take any aerial photography.

For more information, please view the attached fact sheet, or visit

Detailed timing of these works is yet to be confirmed. We will provide further information in the coming months.

In the meantime, if you have any questions, or would like to register another person or group for updates, please contact us at