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THE MONITORING OF NATIONAL AND REGIONAL GEODETIC NETWORKS

The Australian Surveying and Land Information Group (AUSLIG) is the agency with principal responsibility for geodesy at federal government level in Australia. AUSLIG coordinates its national geodesy activities with State and Territory agencies through the Intergovernmental Committee on Surveying and Mapping. The national geodesy program involves the monitoring of movement of the Australian landmass and offshore territories as the basis of a geodetic framework for the Australian Spatial Data Infrastructure. Crustal deformation in a global context requires global observations to best monitor the slow deformation of the earth, and to provide the information essential to support satellite based positioning systems such as GPS. Geodetic data is acquired by AUSLIG from a network of global positioning system and satellite laser ranging stations located in the region and is distributed through the internet in the form of data and analysis products to the national and global community. This contribution enables use to be made of the global systems for local application of GPS for deformation purposes. This paper describes the AUSLIG geodesy program and its contribution to the monitoring of national, regional and global geodetic networks. 1 John Manning is Manager, Geodesy Program, Australian Surveying and Land Information Group 2 Dr Ramesh Govind is Director, Space Geodesy Analysis Centre, Australian Surveying and Land Information Group 3 Peter Holland is General Manager, Australian Surveying and Land Information Group, Department of Industry, Science and Tourism