Results 271 to 280 of about 261,794 (327)

The International Terrestrial Reference Frame: lessons from ITRF2014

Rendiconti Lincei. Scienze Fisiche e Naturali, 2017
We review the progress and continuous improvements being made since more than 30 years in the determination and development of the International Terrestrial Reference Frame (ITRF). We present the modeling innovations introduced in the ITRF2014 elaboration, mainly (1) the estimation of the annual and semi-annual signals embedded in the time series of ...
Altamimi, Zuheir, Rebischung, Paul, Métivier, Laurent, Collilieux, Xavier   +3 more
openaire   +3 more sources

Quality assessment of GPS reprocessed terrestrial reference frame

GPS Solutions, 2010
The International GNSS Service (IGS) contributes to the construction of the International Terrestrial Reference Frame (ITRF) by submitting time series of station positions and Earth Rotation Parameters (ERP). For the first time, its submission to the ITRF2008 construction is based on a combination of entirely reprocessed GPS solutions delivered by 11 ...
Xavier Collilieux, Laurent Métivier, Zuheir Altamimi, Tonie van Dam, Jim Ray   +4 more
openaire   +3 more sources

The International DORIS Service contribution to the 2014 realization of the International Terrestrial Reference Frame

Advances in Space Research, 2016
G. Moreaux, Frank G. Lemoine, H. Capdeville, S. Kuzin, M. Otten, P. Štěpánek, P. Willis, P. Ferrage   +7 more
semanticscholar   +3 more sources

A Sequentially Estimated Terrestrial Reference Frame: JTRF2020

2022
<p>JPL's newly developed software for determining terrestrial reference frames, known as SREF (Square-root REference Frame filter), has been used to produce JTRF2020, a combined terrestrial reference frame determined from the input SINEX files submitted by the IVS, IGS, ILRS, and IDS for ITRF2020.
Richard Gross, Claudio Abbondanza, T. Mike Chin, Mike Heflin, Jay Parker   +4 more
openaire   +1 more source

Refined approaches for terrestrial reference frame computations

Advances in Space Research, 2005
Abstract Recent solutions of the terrestrial reference frame such as ITRF2000 are combined from multi-year data sets that contain station positions at a reference epoch and constant velocities. Analysis of time series of station positions of the geodetic space techniques SLR, GPS, VLBI and DORIS show, however, that these techniques allow to detect ...
B. Meisel, D. Angermann, M. Krügel, H. Drewes, M. Gerstl, R. Kelm, H. Müller, W. Seemüller, V. Tesmer   +8 more
openaire   +1 more source

Advances in terrestrial reference frame computations

2008
In its function as an ITRS Combination Center, DGFI has developed refined methods for the terrestrial reference frame computation. The advanced approach is based on the combination of epoch normal equations (weekly/daily data sets) containing Station positions and Earth orientation parameters (EOP) obtained from different geodetic space techniques such
Detlef Angermann, Hermann Drewes, Manuela Krügel, Barbara Meisel   +3 more
openaire   +2 more sources

GGOS-D Global Terrestrial Reference Frame

2010
The GGOS-D global terrestrial reference frame has been computed from a combination of homogeneously processed VLBI, SLR and GPS observation time series. A major focus was on the analysis of station position time series, investigations regarding the handling of non-linear station motions, and the development of refined combination methods.
Detlef Angermann, Hermann Drewes, Michael Gerstl, Barbara Meisel, Manuela Seitz, Daniela Thaller   +5 more
openaire   +1 more source

The IERS Terrestrial Reference Frame

1990
A Conventional Terrestrial Reference System is determined by the International Earth Rotation Service (IERS), following the recommendation of the IAU and IUGG. Such system enables to produce a Conventional Terrestrial Reference Frame (CTRF) as a network of points (marks or instruments) with appropriate coordinates.
C. Boucher, Z. Altamimi, L. Daniel
openaire   +1 more source

Earth rotation and the terrestrial reference frame

Advances in Space Research, 1986
Abstract The paper is based on the earth rotation results of projects MERIT and COTES. Project MERIT was a program of international collaboration to m onitor e arth r otation and to intercompare the t echniques of observation and analysis. COTES, just as MERIT, was a joint IAU/IUGG Working Group aimed at resolving the issues for
Ivan I. Mueller, George A. Wilkins
openaire   +1 more source

Compatibility assessment of the reference frames orbital realizations broadcasted by the global navigation satellite systems with the International terrestrial reference frame (ITRF) during 2020–2023

Geodesy and Cartography
The compatibility assessment of the terrestrial reference frames orbital realizations broadcasted by the global navigation satellite systems (GPS, GLONASS, Galileo and BeiDou) with the International terrestrial reference frame ITRF during 2020–2023 was ...
I. Gusev, A.M. Golubitskiy
semanticscholar   +1 more source