Results 141 to 150 of about 757,045 (352)

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

Conservative evaluation of the uncertainty in the LAGEOS-LAGEOS II Lense-Thirring test

, 2009
We deal with the test of the general relativistic gravitomagnetic Lense-Thirring effect currently ongoing in the Earth's gravitational field with the combined nodes \Omega of the laser-ranged geodetic satellites LAGEOS and LAGEOS II.
A. Milani, B. D. Tapley, B. Mashhoon, C. W. F. Everitt, C. W. F. Everitt, Ch. Reigber, D. M. Lucchesi, D. M. Lucchesi, D. M. Lucchesi, D. M. Lucchesi, D. M. Lucchesi, D. M. Lucchesi, D. M. Lucchesi, D. M. Lucchesi, E.C. Pavlis, F. J. Lerch, F. Vespe, H. Pfister, I. Ciufolini, I. Ciufolini, I. Ciufolini, I. Ciufolini, I. Ciufolini, I. Ciufolini, I. Ciufolini, J. C. Ries, J. C. Ries, J. C. Ries, J. Lense, L. Cugusi, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Iorio, L. Schiff, M. L. Ruggiero, M. R. Pearlman, P. Inversi, R. A. Patten Van, R. A. Patten Van, W. M. Kaula   +47 more
core   +1 more source

Direct Observational Evidence of the Mesoscale Gravity Wave Modulations on Low‐Latitude Sporadic E Layer

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Sporadic E (Es) layer plays essential role in ionosphere‐atmosphere coupling. Theoretical simulations show that the atmospheric gravity waves (GWs) in the lower thermosphere are the main modulatory source on Es dynamics at small spatial scales and short periods.
Junyi Wang, Xinan Yue, Xu Zhou, Yihui Cai, Feng Ding, Jorge L. Chau, David C. Fritts, Juha Vierinen, Alan Z. Liu, Baiqi Ning   +9 more
wiley   +1 more source

Synoptic Features Driving the CO2 Sink in the Mediterranean Sea in Winter

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 2, 28 January 2026.
Abstract The Mediterranean Sea is a weak sink for the atmospheric CO2 with the October‐March extended winter season characterized by the occurrence of high CO2 sink events. Here, we analyzed state‐of‐the‐art ocean and atmospheric reanalyses and observational data sets to investigate the variability of the winter sink and its relation with synoptic ...
M. Reale, F. Giordano, V. Di Biagio, G. Cossarini, S. Salon   +4 more
wiley   +1 more source

Comprehensive Analysis of HY-2B/2C/2D Satellite-Borne GPS Data Quality and Reduced-Dynamic Precise Orbit Determination

Aerospace
The deployment of the HY-2B/2C/2D satellite constellation marks a significant advancement in China’s marine dynamic environmental satellite program, forming a robust three-satellite network.
Xin Jin, Guangzhe Wang, Jinyun Guo, Hailong Peng, Yongjun Jia, Xiaotao Chang   +5 more
doaj   +1 more source

A proposed concept for a crustal dynamics information management network [PDF]

The findings of a requirements and feasibility analysis of the present and potential producers, users, and repositories of space-derived geodetic information are summarized.
Lohman, G. M., Renfrow, J. T.
core   +1 more source

Basic research and data analysis for the National Geodetic Satellite Program [PDF]

Reports and papers dealing with data analysis for the National Geodetic Satellite Program by Ohio State University's Department of Geodetic Science are ...
Mueller, I. I.
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

Clustered Land Restoration Projects Increase Cloud Formation in West African Drylands

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 2, 28 January 2026.
Abstract Land restoration projects are implemented across Africa to combat land degradation and climate change. By changing the vegetation cover, these projects can potentially impact cloud formation through changes in energy and water partitioning between the Earth's surface and the atmosphere.
J. Ruijsch, A. J. Teuling, C. M. Taylor, G. J. Steeneveld, R. W. A. Hutjes   +4 more
wiley   +1 more source

Satellite geodesy on the lawn

Eos, Transactions American Geophysical Union, 1987
During the 1986 AGU Fall Meeting in December, four Global Positioning System (GPS) receivers were demonstrated in a simulated field condition. Although billed as a “shootout,” constraints of time and location dictated that this demonstration would not be a valid test of the receivers, and in retrospect, it should not be viewed as such.
openaire   +1 more source