W-0 Estimates in the Frame of the GGOS Working Group on Vertical Datum Standardisation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F14%3A00481944" target="_blank" >RIV/67985815:_____/14:00481944 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26110/14:PU117621
Result on the web
<a href="http://dx.doi.org/10.1007/978-3-319-10837-7_26" target="_blank" >http://dx.doi.org/10.1007/978-3-319-10837-7_26</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/978-3-319-10837-7_26" target="_blank" >10.1007/978-3-319-10837-7_26</a>
Alternative languages
Result language
angličtina
Original language name
W-0 Estimates in the Frame of the GGOS Working Group on Vertical Datum Standardisation
Original language description
During the 2011 IUGG General Assembly, GGOS, the IAG Commissions 1 (Reference Frames) and 2 (Gravity Field) and the IGFS established a joint working group devoted to the Vertical Datum Standardisation. This working group supports the activities of GGOS Theme 1 Unified Height System, in particular, to recommend a reliable geopotential value W-0 to be introduced as the conventional reference level for the realisation of the GGOS Vertical Reference System. At present, the most commonly accepted W-0 value corresponds to the best estimate available in 2004. This value presents discrepancies of about 2 m(2) s(-2) with respect to recent computations based on the latest Earth's surface and gravity field models. According to this, as a first approach, four different teams working on the computation of a global W-0 value were brought together in order to compare methodologies and models, and to establish the reliability of the individual computations. Results of this comparison show that the four individual estimates present a maximum discrepancy of about 0.5 m(2) s(-2). They also confirm that the W-0 value declared as the best estimate in 2004 corresponds to an equipotential surface located about 17 cm beneath the sea surface scanned by satellite altimetry, while the potential value U-0 of the GRS80 ellipsoid realises an equipotential surface located about 67 cm lower. In this context, the need to provide a new better estimate of W-0 is evident.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Gravity, Geoid and Height Systems
ISBN
978-3-319-10836-0
ISSN
0939-9585
e-ISSN
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Number of pages
8
Pages from-to
203-210
Publisher name
Springer
Place of publication
New Yourk
Event location
Venice
Event date
Oct 9, 2012
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000358612900026