In October 2001, maintenance work on the GPS and ancillary equipment at Australia's Antarctic base at Casey was carried out. This site forms part of the Australian Regional GPS Network (ARGN). In addition accurate measurements were taken of the relationship between the ARGN monument and the three reference marks to check for any possible local movement since the site was established in December 1993. These measurements also provide a reliable base measurement for future monitoring. A GPS connection and difference in height by optical levelling between the ARGN monument and the tide gauge benchmark was also completed. This report documents the methods and results of these surveys.

OCCAM 5.0 has new limits: 20 stations and 100 radiosources can be processed simultaneously. The number of baselines under study is 190, correspondingly. The current version of OCCAM supports IERS Conventions 2000. The ephemeride DE405/LE405 takes the place of DE403/LE403. To correct subdiurnal EOP variations two models can be chosen: proposed by Ray (recommended by IERS Conventions 1996) and by Eanes (IERS Conventions 2000) which takes into account many more tidal terms. A new leastsquares approach based on the Gauss-Markov model is available with the new version

Time series of Earth Orientation Parameters (EOP) have been obtained from independent parallel VLBI networks NEOS-A and CORE-A using OCCAM 5.0 software. This paper presents the results and their detailed consideration. The EOP time series are approximated by linear functions so offset and rate of the differences NEOS - CORE canbe estimated. It appears that biases between two EOP systems are negligibly small in 1996-1997 years but are increasing in time.

Product no longer exists, please refer to GeoCat #30413 for the data

Product no longer exists, please refer to GeoCat #30413 for the data

Product no longer exists, please refer to GeoCat #30413 for the data

Product no longer exists, please refer to GeoCat #30413 for the data

Product no longer exists, please refer to GeoCat #30413 for the data

This map is part of the series that covers the whole of Australia at a scale of 1:250 000 (1cm on a map represents 2.5 km on the ground) and comprises 513 maps. This is the largest scale at which published topographic maps cover the entire continent. Each standard map covers an area of 1.5 degrees longitude by 1 degree latitude or about 150 kilometres from east to west and 110 kilometres from north to south. There are about 50 special maps in the series and these maps cover a non-standard area. Typically, where a map produced on standard sheet lines is largely ocean it is combined with its landward neighbour. These maps contain natural and constructed features including road and rail infrastructure, vegetation, hydrography, contours (interval 50m), localities and some administrative boundaries. The topographic map and data index shows coverage of the sheets. Product Specifications Coverage: The series covers the whole of Australia with 513 maps. Currency: Ranges from 1995 to 2009. 95% of maps have a reliability date of 1994 or later. Coordinates: Geographical and either AMG or MGA (post-1993) Datum: AGD66, GDA94, AHD. Projection: Universal Traverse Mercator (UTM) Medium: Paper, flat and folded copies.

This map is part of the series that covers the whole of Australia at a scale of 1:250 000 (1cm on a map represents 2.5 km on the ground) and comprises 513 maps. This is the largest scale at which published topographic maps cover the entire continent. Each standard map covers an area of 1.5 degrees longitude by 1 degree latitude or about 150 kilometres from east to west and 110 kilometres from north to south. There are about 50 special maps in the series and these maps cover a non-standard area. Typically, where a map produced on standard sheet lines is largely ocean it is combined with its landward neighbour. These maps contain natural and constructed features including road and rail infrastructure, vegetation, hydrography, contours (interval 50m), localities and some administrative boundaries. The topographic map and data index shows coverage of the sheets. Product Specifications Coverage: The series covers the whole of Australia with 513 maps. Currency: Ranges from 1995 to 2009. 95% of maps have a reliability date of 1994 or later. Coordinates: Geographical and either AMG or MGA (post-1993) Datum: AGD66, GDA94, AHD. Projection: Universal Traverse Mercator (UTM) Medium: Paper, flat and folded copies.