Results 121 to 130 of about 26,637 (257)

Consideration of permanent tidal deformation in the orbit determination and data analysis for the Topex/Poseidon mission [PDF]

The effects of the permanent tidal effects of the Sun and Moon with specific applications to satellite altimeter data reduction are reviewed in the context of a consistent definition of geoid undulations.
Klosko, Steven M., Nerem, R. Steven, Rapp, Richard H., Shum, C. K., Williamson, Ronald G.   +4 more
core   +1 more source

Measuring the De Sitter precession with a new Earth's satellite to the $\mathbf{\simeq 10^{-5}}$ level: a proposal

, 2019
The inclination $I$ of an Earth's satellite in polar orbit undergoes a secular De Sitter precession of $-7.6$ milliarcseconds per year for a suitable choice of the initial value of its non-circulating node $\Omega$.
Iorio, Lorenzo
core   +1 more source

Assessment of the Spatiotemporal Patterns and Ecological Impacts of Photovoltaic Power Plants in Central Asia

Earth's Future, Volume 14, Issue 3, March 2026.
Abstract Photovoltaic (PV) power plants rapidly expand in drylands because of the high solar potential and efficient land‐use capabilities. However, existing PV data sets are often incomplete and lack installation timestamps, which significantly hinder comprehensive assessments of PV power plants' ecological impacts. By integrating a random forest (RF)
Yitong Gao, Qiuli Yang, Peng Chang, Chengxiang Wang, Xuyang Wang, Mengran Yu, Ruoxi Liu, Babierjiang Dilixiati, Qingdong Shi, Yryszhan Zhakypbek   +9 more
wiley   +1 more source

Report of the panel on international programs [PDF]

The panel recommends that NASA participate and take an active role in the continuous monitoring of existing regional networks, the realization of high resolution geopotential and topographic missions, the establishment of interconnection of the reference
Anderson, Allen Joel, Fuchs, Karl W., Ganeka, Yasuhiro, Gaur, Vinod, Green, Andrew A., Lambert, Anthony, Rais, Jacub, Reighber, Christopher, Seeger, Herman, Siegfried, W.   +9 more
core   +1 more source

Breaking the Temporal Resolution Barrier: Projected Performance of Hybrid Gravity Satellite Ensemble by the Early 2030s

Earth's Future, Volume 14, Issue 3, March 2026.
Abstract Limitations in the temporal resolution of contemporary gravity satellite missions hinder the precise monitoring of rapid Earth surface mass changes. By the early 2030s, unprecedented high‐temporal monitoring of Earth's dynamic mass redistribution will be available using the temporal gravity field derived from the Hybrid Gravity Satellite ...
Zhengwen Yan, Jiangjun Ran, Jianli Chen, Martin Lasser, Patrick Smith, Yu Zhang, Luca Massotti   +6 more
wiley   +1 more source

Gravity field, geoid and ocean surface by space techniques [PDF]

Knowledge of the earth's gravity field continued to increase during the last four years. Altimetry data from the GEOS-3 satellite has provided the geoid over most of the ocean to an accuracy of about one meter.
Anderle, R. J.
core   +1 more source

Dynamical orbital effects of General Relativity on the satellite-to-satellite range and range-rate in the GRACE mission: a sensitivity analysis

, 2012
We numerically investigate the impact of GTR on the orbital part of the satellite-to-satellite range \rho and range-rate \dot\rho of the twin GRACE A/B spacecrafts through their dynamical equations of motion integrated in an Earth-centered frame over a ...
Brumberg, Casotto, Cheng, Chicone, Ciufolini, Ciufolini, Dvali, Haranas, Iorio, Iorio, Kim, Kopeikin, Kopeikin, Kopeikin, Larson, Lense, Lorenzo Iorio, Moyer, Murray, Pail, Reigber, Schmidt, Shapiro, Soffel, Tapley, Wagner, Wei, Will, Wolf   +28 more
core   +1 more source

A Joint Inversion Algorithm of GNSS and InSAR for Continuous 3‐D Surface Velocities and Associated Horizontal Strain Rate Field

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract Simultaneous analyses of complementary GNSS and InSAR measurements may lead to breakthroughs in our understanding of crustal deformation. We present an algorithm that combines InSAR with GNSS measurements, in which the GNSS data can be used either as original station velocities or as an interpolated and smoothed velocity field, to estimate ...
Jeonghyeop Kim, Mradula Vashishtha, William E. Holt, Kyle D. Murray, Rowena B. Lohman   +4 more
wiley   +1 more source

Research program of the Geodynamics Branch [PDF]

This report is the Fourth Annual Summary of the Research Program of the Geodynamics Branch. The branch is located within the Laboratory for Terrestrial Physics of the Space and Earth Sciences Directorate of the Goddard Space Flight Center.
Boccucci, B. S., Cohen, S. C., Kahn, W. D.   +2 more
core   +1 more source

Intense Ground Magnetic Perturbations During the 2024 May and October Geomagnetic Storms

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract The May and October 2024 geomagnetic storms represent two of the most intense space weather events of Solar Cycle 25. While differing in global intensity, both storms produced extreme ionospheric disturbances, including equatorward auroral expansion to mid‐latitudes and rapid geomagnetic variations (dH/dt $\text{dH}/\text{dt}$).
P. De Michelis, E. Consolini, F. Giannattasio, G. Consolini   +3 more
wiley   +1 more source