Reference Frame Improvements
Abstract
Use of a stable reference frame can greatly simplify the interpretation, comparison, and combination of geodetic position estimates. Many improvements over the past decade led to the construction of ITRF2000 which provides stability at the level of about 1 mm/yr horizontally and 2 mm/yr vertically. Many techniques contributed to the construction of ITRF2000 with the origin provided by SLR, the scale provided by SLR and VLBI, and densification provided by GPS. Access to the frame is typically achieved through a set of positions and velocities which are used for alignment or constraint. A number of issues are being considered for future improvement including strategies to provide better regional access to the frame, methods to handle non-linear effects such as seasonal loading and seismic deformation, incorporation of origin and scale information from GPS, and integration of estimates from Galileo.
- Publication:
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AGU Spring Meeting Abstracts
- Pub Date:
- May 2004
- Bibcode:
- 2004AGUSM.G24A..01H
- Keywords:
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- 1229 Reference systems;
- 1243 Space geodetic surveys