Results 51 to 60 of about 4,892 (167)

SLR Validation and Evaluation of BDS-3 MEO Satellite Precise Orbits

Remote Sensing
Starting from February 2023, the International Laser Ranging Service (ILRS) began releasing satellite laser ranging (SLR) data for all BeiDou global navigation satellite system (BDS-3) medium earth orbit (MEO) satellites.
Ran Li, Chen Wang, Hongyang Ma, Yu Zhou, Chengpan Tang, Ziqian Wu, Guang Yang, Xiaolin Zhang   +7 more
doaj   +1 more source

A History of UNAVCO: Four Decades of Advancing Geodesy

Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.
Abstract UNAVCO was a university‐governed consortium funded by the National Science Foundation (NSF), with support from the National Aeronautics and Space Administration (NASA) and the United States Geological Survey (USGS), to support geoscience research and education using geodesy.
Emily E. Zawacki, Donna J. Charlevoix, Charles M. Meertens, Jeffrey T. Freymueller, Tonie van Dam   +4 more
wiley   +1 more source

Geophysical parameters from the analysis of laser ranging to starlette [PDF]

Starlette Satellite Laser Ranging (SLR) data were used, along with several other satellite data sets, for the solution of a preliminary gravity field model for TOPEX, PTGF1.
Schutz, B. E., Shum, C. K.
core   +4 more sources

A correction method of encoder bias in satellite laser ranging system

Geodesy and Geodynamics, 2013
In a satellite laser ranging telescope system, well-aligned encoders of the elevation and azimuth axes are essential for tracking objects. However, it is very difficult and time-consuming to correct the bias between the absolute-position indices of the ...
Wang Peiyuan, Zhu Wei, Zou Tong, Guo Tangyong   +3 more
doaj   +1 more source

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

Mass Change Index for Characterizing Hydrological Extremes Every Few Days From Satellite Gravity Measurements

Water Resources Research, Volume 61, Issue 12, December 2025.
Abstract We introduce a new hydrological index that enables assessment of extreme events every few days from the GRACE Follow‐On (GRACE‐FO) satellite mission. The Mass Change Index (MCI) was developed by standardizing instantaneous satellite gravity anomalies computed directly from orbit perturbations.
Miao Tang, Shin‐Chan Han, Linguo Yuan, Xinghai Yang, In‐Young Yeo, Matthew Rodell, Bailing Li, Eunjee Lee, Zhongshan Jiang   +8 more
wiley   +1 more source

Time-Variable Gravity Field from the Combination of HLSST and SLR

Remote Sensing, 2021
The Earth’s time-variable gravity field is of great significance to study mass change within the Earth’s system. Since 2002, the NASA-DLR Gravity Recovery and Climate Experiment (GRACE) and its successor GRACE follow-on mission provide observations of ...
Luping Zhong, Krzysztof Sośnica, Matthias Weigelt, Bingshi Liu, Xiancai Zou   +4 more
doaj   +1 more source

How to reach a few percent level in determining the Lense-Thirring effect?

, 2004
In this paper we discuss and compare a node-only LAGEOS-LAGEOS II combination and a node-only LAGEOS-LAGEOS II-Ajisai-Jason1 combination for the determination of the Lense-Thirring effect. The new combined EIGEN-CG01C Earth gravity model has been adopted.
A. Sengoku, A. Sengoku, B.D. Tapley, C. Lämmerzahl, C.M. Will, C.W.F. Everitt, Ch. Reigber, D. Lucchesi, D. Lucchesi, D.G. Kubitschek, E. Doornbos, E.C. Pavlis, E.C. Pavlis, Eelco Doornbos, F.A. Abd El-Salam, I. Ciufolini, I. Ciufolini, I. Ciufolini, I. Ciufolini, I. Ciufolini, J.A. Marshall, J.A. Marshall, J.C. Ries, K. Nordtvedt, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Stella, L.I. Schiff, Lorenzo Iorio, P.G. Antreasian, S.B. Luthcke   +35 more
core   +1 more source

On Some Critical Issues of the LAGEOS-Based Tests of the Lense-Thirring Effect [PDF]

, 2010
We summarize some critical issues pertaining the tests of the general relativistic Lense-Thirring effect performed by I. Ciufolini and coworkers in the gravitational field of the Earth with the geodetic satellites LAGEOS and LAGEOS II tracked with the ...
Iorio, L.
core   +1 more source

Confronting Episodic vs. Continuous Heat Sources in Long‐Lived Hot Orogens: Insights From Petrochronological Studies in the Nova Venecia Complex, Araçuaí Orogen (SE Brazil)

Journal of Metamorphic Geology, Volume 43, Issue 9, Page 863-890, December 2025.
ABSTRACT Orogenic belts that sustain elevated temperatures at intermediate crustal depths for tens of millions of years are known as hot orogens. The evolution of these hot orogens is largely influenced by thermal maturation, primarily driven by the distribution of heat‐producing elements (HPEs), such as K, Th and U in the overthickened crust.
Lucas R. Schiavetti, Vinicius T. Meira, Sean Mulcahy, Jeffrey D. Vervoort, Peter L. Baker, George L. Luvizotto, Ricardo I. F. Trindade   +6 more
wiley   +1 more source