Ginan: GNSS Analysis Centre Software
Ginan is Geoscience Australia’s Global Navigation Satellite System (GNSS) analysis centre software that delivers a real-time positioning correction service through an open-source software, and additional positioning products to enable precise point positioning for Australian industry and users.
Ginan is a key component to the National Positioning Infrastructure Capability (NPIC) and increases positioning accuracy to 3 to 5 centimetres (from 5 to 10 metres) across Australia.
The name Ginan comes from the Wardaman people, traditionally living in the region south-west of Katherine in the Northern Territory. Ginan is a Wardaman word for a red dilly-bag filled with songs of knowledge and the fifth-brightest star in the Southern Cross. Just as the Southern Cross helped the First Australians to navigate this land, the positioning capability developed by Geoscience Australia will provide information on exactly where we are and where we are going.
The latest version of Ginan can be accessed through Geoscience Australia’s GitHub page. Please note that this software is continuously updated with new functionality.
About Ginan, GNSS Analysis Centre Software
The Ginan GNSS Analysis Centre Software has been developed by Geoscience Australia, in partnership with industry and universities.
Ginan will help keep track of multi-GNSS performance over Australia, enable production of the positioning products to realise the full benefit of the navigation systems that operate in our region, and help the development of the next generation of geodetic datums.
Ginan is a fully open-source software where users are able to download and use the software as a whole, or download and customise certain elements to meet a users individual specific need.
The software will:
- promote Australia’s unique modelling and analyse systems for multi-GNSS processing in real-time and deliver precise positioning products to the Australian and international PNT community
- support expert advice on navigation system performance over Australia
- provide a state-of-art GNSS analysis centre software to universities and research organisations, to enable Australia to lead the development of geospatial technology.
By making the software open-source, Geoscience Australia is:
- supporting GNSS education by allowing students and researchers to examine how the GNSS Analysis Centre Software algorithms work to solve complex problems
- enabling researchers and commercial organisations to use the software to solve research or commercial problems.
The interoperable nature of the software will allow and encourage users to develop innovative position-dependent technology and services that will be of economic benefit to Australia. This will grow the market for equipment manufacturers, technology integrators, service providers, the science community and end users and enable them to realise the full benefits of GNSS.
How to get access
You can access the open source software and the products (files and correction messages) in real-time to enable precise point positioning.
The latest version of the software is available under an open source licence from Geoscience Australia’s Github.
If you would like to stay informed about software developments and updates, you can subscribe to Positioning News, which is Positioning Australia’s regular email newsletter.
How it works
GNSS satellites have to operate in a dynamic and complex space environment and their positioning and timing signals have to pass through the atmosphere to be received on Earth. The systems within the satellite, the space environment and the atmosphere all affect the satellite signal which means that positions determined by receivers on the ground come with a potential error. Uncorrected signals are only accurate to 5–10 metres.
Ginan is best described as a super GNSS data processor. It applies models of the Earth’s gravity (Earth tides) and Ionosphere, in order to create corrections for potential errors.
The software takes signal data from many satellites and constellations and combines it with predictions from the models to create a correction signal. When applied with a GNSS receiver, this signal can increase the accuracy of a calculated position reliably to within a few centimetres.