Authors / CoAuthors
Sarti, P. | Abbondanza, C. | Dawson, J.H.
Abstract
The combination of space geodetic techniques nowadays relies on the provision of accurate tie vectors locally measured on ground at geodetic co-location sites. Co-location of space geodetic sensors on-board of orbiting spacecraft (i.e. space co-locations) is an appealing solution to mitigate the shortcomings of terrestrial local ties, but their implementation in routine data processing is yet to be realised, and for now ground co-locations represent the only practical solution. Tie vectors directly enter and affect the computation of the global terrestrial reference frame, and as a consequence must be provided with an utmost level of accuracy. In addition, accurate tie vectors can be used to identify the presence of specific systematic errors affecting space geodetic techniques. In this presentation, we review the state-of-the-art in tie vector estimation and identify the factors that can degrade their accuracy as well as spotlighting common shortcomings present in the estimation process. Some of the issues we will discuss apply equally to co-locations of sensors in space and pertain to the level of accuracy currently achievable with the combination of space geodetic observations within GGOS.
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nonGeographicDataset
eCat Id
72714
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Keywords
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- External Publication
- ( Theme )
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- geodesy
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
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2011-01-01T00:00:00
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