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| Titel |
Preliminary Analysis in view of ITRF2008 |
| VerfasserIn |
Z. Altamimi, X. Collilieux, L. Métivier |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250021631
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| Zusammenfassung |
| The Product Center of the International Terrestrial Reference
Frame (ITRF) has issued a call for participation in view of a new
release of the ITRF, the ITRF2008. It is expected that the ITRF2008
will greatly benefit from the expected improvement of the reprocessing
effort being undertaken by the Technique Centers of the four techniques
(VLBI, SLR, GPS and DORIS). It is anticipated to have some if not
all technique solutions available so that initial pre-analysis can
be performed and their quality assessed. The preliminary analysis will
focus on main issues related to the frame specification and its defining
parameters: origin, scale, orientation and their time evolution. As the
input data will be in the form of time series of station positions
(weekly for satellite techniques and daily for VLBI) and daily Earth
Orientation Parameters, a particular emphasis will be given to the
first step of the ITRF2008 construction, namely the analysis of the
temporal behavior of the frame physical parameters (origin and scale).
As a function of solutions availability, other analysis aspects will
be presented, such as performance assessment with respect to ITRF2005,
re-evaluation of the consistency between the available local ties and
space geodesy estimates, velocity agreement between techniques in
co-location sites and the impact on the long-term frames of correcting
geophysical fluid loading effects prior to the stacking of the time
series of station positions. |
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