Results 111 to 120 of about 757,045 (352)

Perspectives in measuring the PPN parameters beta and gamma in the Earth's gravitational fields with the CHAMP/GRACE models

, 2007
The current bounds on the PPN parameters gamma and beta are of the order of 10^-4-10^-5. Various missions aimed at improving such limits by several orders of magnitude have more or less recently been proposed like LATOR, ASTROD, BepiColombo and GAIA ...
Ciufolini I., Cugusi L., Einstein A., Iorio L., Iorio L., Kaula W. M., LORENZO IORIO, Lucchesi D. M., Milani A.   +8 more
core   +1 more source

Seismological Evidence of Multiple Crustal Magma Reservoirs Beneath Mt. Wrangell in Southcentral Alaska

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Recent studies have challenged the classical view of magma chambers as ephemeral, melt‐rich bodies confined to shallow depths beneath arc volcanoes at subduction zones. Instead, increasing evidence supports the existence of long‐lived, vertically extensive magmatic systems with persistent partial melts within the crust. Nevertheless, the depth
Qili Andy Dai, Haiying Gao, Sahria Nayon, Zane Michael Cleghorn, Cong Li   +4 more
wiley   +1 more source

Satellite geodesy: Data acquisition

Eos, Transactions American Geophysical Union, 1971
After more than a decade of satellite observations, the data acquired during the past quadrennium have been the catalyst needed to bring about great achievements in satellite geodesy. Unlike earlier solutions our present determinations include very elaborate gravitational models containing hundreds of terms, precise worldwide positions good to ±10 ...
openaire   +1 more source

Dynamic Boundaries of Antarctic Active Subglacial Lakes Reveal Underestimated Water Volume Change and Overestimated Lakebed Active Area

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract This study revisited 158 documented active subglacial lakes across Antarctica, applying a height‐change anomaly delineation algorithm to CryoSat‐2 and ICESat‐2 satellite altimetry data to assemble a 14.75‐year (2010.5–2025.25) time series of active subglacial lake dynamics.
W. Sauthoff, M. R. Siegfried, R. A. Venturelli, B. E. Smith   +3 more
wiley   +1 more source

Analysis of the Dihedral Corner Reflector’s RCS Features in Multi-Resource SAR

Applied Sciences
Artificial corner reflectors are widely used in the vegetated landslide for time series InSAR monitoring due to their permanent scattering features. This paper investigated the RCS features of a novel dihedral CR under multi-resource SAR datasets. An RCS
Jie Liu, Tao Li, Sijie Ma, Yangmao Wen, Yanhao Xu, Guigen Nie   +5 more
doaj   +1 more source

Abnormally Large Magma Flux Does Not Lead to Eruption in Subduction Zone Calderas: The 2022–2023 Episode of Uplift of Aniakchak Crater (Aleutians)

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Observations of ground deformation provide insights on the triggering mechanisms of eruptions. At Aniakchak Crater (Aleutians) InSAR measured ∼ ${\sim} $72 cm of uplift in less than 7 months between 2022 and 2023. The uplift can be explained by the inflation of a point pressure source at a depth of 3.2 km.
Francisco Delgado
wiley   +1 more source

Geographically-Informed Modeling and Analysis of Platform Attitude Jitter in GF-7 Sub-Meter Stereo Mapping Satellite

ISPRS International Journal of Geo-Information
The GF-7 satellite, China’s inaugural sub-meter-level stereoscopic mapping satellite, has been deployed for a wide range of applications, including natural resource investigation, environmental monitoring, fundamental surveying, and the development of ...
Haoran Xia, Xinming Tang, Fan Mo, Junfeng Xie, Xiang Li   +4 more
doaj   +1 more source

Topographic Effects in Geoid Determinations

Geosciences, 2018
Traditionally, geoid determination is applied by Stokes’ formula with gravity anomalies after removal of the attraction of the topography by a simple or refined Bouguer correction, and restoration of topography by the primary indirect topographic ...
Lars E. Sjöberg
doaj   +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

Davemaoite Elasticity Reveals Slab‐Induced Heterogeneity in the Mantle Transition Zone

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract The observed 2%–7% low‐shear velocity (VS) anomalies near the subducted slab at the bottom mantle transition zone (MTZ) indicate strong lateral heterogeneity, which is commonly attributed to subducted oceanic crust. However, davemaoite, a major constituent of the subducted oceanic crust, has been poorly constrained in its elasticity, hindering
Yingxin Yu, Xinyue Zhang, Dongzhou Zhang, Luo Li, Zhu Mao, Ningyu Sun, Denglei Wang, Jing Li, Chaoshuai Zhao, Cheng Qian, Yingzhan Wei, Xinyang Li, Yuzhu Wang, Takayuki Ishii   +13 more
wiley   +1 more source