Results 31 to 40 of about 261,794 (327)

THE IMPLEMENTATION OF MODERN GEOCENTRIC DATUM: A REVIEW [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
A dynamic datum denotes a coordinate datum in real-time linked with the International Terrestrial Reference Frame (ITRF) in order to provide a dynamic ITRF-like datum to the users.
N. M. Yazid, A. H. M. Din, A. H. M. Din, N. M. Abdullah, A. H. Omar   +4 more
doaj   +1 more source

Positioning the Terrestrial Ephemeris Origin in the International Terrestrial Reference Frame [PDF]

Astronomy & Astrophysics, 2002
Resolution B1.8 adopted by the XXIV General Assembly of the International Astronomical Union (Manchester, August 2000) recommends the use of the Non-Rotating Origin (Guinot [CITE]) on the moving equator both in the International Celestial Reference System (ICRS) and in the International Terrestrial Reference System (ITRS). The Non-Rotating Origin (NRO)
Lambert, Sébastien, Bizouard, Christian
openaire   +3 more sources

Realization of time sequential estimation of terrestrial reference frame using square-root information filter and smoother

, 2020
The JTRF2014 realization of terrestrial reference frame has adopted a weekly time series representation that can track dominant non-linear station motions including periodic and random variations.
T. M. Chin, C. Abbondanza, R. Gross, M. Heflin, J. Parker, Benedikt Soja, Xiaoping Wu   +6 more
semanticscholar   +1 more source

On the timing between terrestrial gamma ray flashes, radio atmospherics, and optical lightning emission [PDF]

, 2017
On 25 October 2012 the Reuven Ramaty High Energy Solar Spectroscope Imager (RHESSI) and the Tropical Rainfall Measuring Mission (TRMM) satellites passed over a thunderstorm on the coast of Sri Lanka.
Bitzer, Phillip, Christian, Hugh J., Gjesteland, Thomas, Østgaard, Nikolai   +3 more
core   +3 more sources

Precise Orbital and Geodetic Parameter Estimation using SLR Observations for ILRS AAC [PDF]

Journal of Astronomy and Space Sciences, 2013
In this study, we present results of precise orbital geodetic parameter estimation using satellite laser ranging (SLR) observations for the International Laser Ranging Service (ILRS) associate analysis center (AAC).
Young-Rok Kim, Eunseo Park, Hyungjik Jay Oh, Sang-Young Park, Hyung-Chul Lim, Chandeok Park   +5 more
doaj   +1 more source

Sagnac Effect, Ring Lasers and Terrestrial Tests of Gravity [PDF]

, 2015
Light can be used as a probe to explore the structure of space-time: this is usual in astrophysical and cosmological tests, however it has been recently suggested that this can be done also in terrestrial laboratories.
Ruggiero, Matteo Luca
core   +4 more sources

Realization of the Primary Terrestrial Reference Frame [PDF]

International Astronomical Union Colloquium, 1991
AbstractThe PTRF is based on 43 sites with 64 SSC collocation points with the optimum geographic distribution, which were selected from all stations of the ITRF89 according to the criterion of the minimum value of the errors of 7 parameters of transformation.
W. Kosek, B. Kołaczek
openaire   +1 more source

Impact of network constraining on the terrestrial reference frame realization based on SLR observations to LAGEOS

Journal of Geodesy, 2019
The Satellite Laser Ranging (SLR) network struggles with some major limitations including an inhomogeneous global station distribution and uneven performance of SLR sites.
R. Zajdel, K. Sośnica, M. Drożdżewski, G. Bury, D. Strugarek   +4 more
semanticscholar   +1 more source

On the eve of the 100th anniversary of IAU Commission 19/A2 “Rotation of the Earth” [PDF]

, 2018
Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence
Brzeziński, Aleksander, Capitaine, Nicole, Dehant, Véronique, Gross, Richard, Huang, Chengli, Malkin, Zinovy, McCarthy, Dennis, Schuh, Harald, Vondrák, Jan, Yatskiv, Yaroslav   +9 more
core   +1 more source

SNR-Based GNSS-R for Coastal Sea-Level Altimetry

Geosciences, 2021
Geodetic Global Navigation Satellite System reflectometry (GNSS-R) uses ground-based signals of opportunity to retrieve sea levels at an intermediate spatial scale.
Sajad Tabibi, Renaldo Sauveur, Kelly Guerrier, Gerard Metayer, Olivier Francis   +4 more
doaj   +1 more source