About: Earth orientation parameters based on EOC-4 astrometric catalog

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Recently we derived a new star catalog EOC-4 that contains not only the mean positions and linear proper motions, but alsoperiodic changes, due to orbital motions, for double and multiple star systems. This catalog is now used, as a basic celestial frame, to obtain the Earth orientation parameters from optical astrometric observations of latitude/universal time/altitude in the interval 1899.7-1992.0. Polar motion is determined in 5-day steps for the whole interval studied, Universal time covers the interval 1956.0-1992.0 (i.e., after the invention of atomic clocks) also in 5-day steps, and celestial pole offsets (with respect to recent IAU2000 and IAU2006 models of nutation and precession) are modeled by second-order polynomials of time. In addition to these, a combination of Love and Shida numbers for each observing site is computed. Recently we derived a new star catalog EOC-4 that contains not only the mean positions and linear proper motions, but alsoperiodic changes, due to orbital motions, for double and multiple star systems. This catalog is now used, as a basic celestial frame, to obtain the Earth orientation parameters from optical astrometric observations of latitude/universal time/altitude in the interval 1899.7-1992.0. Polar motion is determined in 5-day steps for the whole interval studied, Universal time covers the interval 1956.0-1992.0 (i.e., after the invention of atomic clocks) also in 5-day steps, and celestial pole offsets (with respect to recent IAU2000 and IAU2006 models of nutation and precession) are modeled by second-order polynomials of time. In addition to these, a combination of Love and Shida numbers for each observing site is computed. (en)
Title	Earth orientation parameters based on EOC-4 astrometric catalog Earth orientation parameters based on EOC-4 astrometric catalog (en)
skos:prefLabel	Earth orientation parameters based on EOC-4 astrometric catalog Earth orientation parameters based on EOC-4 astrometric catalog (en)
skos:notation	RIV/67985815:_____/10:00356482!RIV11-MSM-67985815
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA205/08/0908), P(LC506), Z(AV0Z10030501)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Štefka, Vojtěch Vondrák, Jan Ron, Cyril
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Astronomický ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	255648
http://linked.open...ai/riv/idVysledku	RIV/67985815:_____/10:00356482
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Earth orientation; astrometry; reference systems (en)
http://linked.open.../riv/klicoveSlovo	Earth orientation astrometry reference systems
http://linked.open...odStatuVydavatele	CZ - Česká republika
http://linked.open...ontrolniKodProRIV	[1C2D2FBF0303]
http://linked.open...i/riv/nazevZdroje	Acta geodynamica et geomaterialia
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Analysis of the geophysical excitations in the Earth orientation parameters Recent dynamics of the Earth
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	7
http://linked.open...iv/tvurceVysledku	Ron, Cyril Vondrák, Jan Štefka, Vojtěch
http://linked.open...ain/vavai/riv/wos	000283404800002
http://linked.open...n/vavai/riv/zamer	Astronomie a astrofyzika
issn	1214-9705
number of pages	7 (xsd:int)

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