Results 71 to 80 of about 26,941 (300)

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

Building a Continental‐Scale Geodetic Network: The Plate Boundary Observatory (PBO)

Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Abstract The Plate Boundary Observatory (PBO) transformed the use of geodesy in North America to study crustal deformation and plate boundary processes by establishing a continental‐scale, standardized, open‐access geodetic network. Built and operated by UNAVCO between 2003 and 2018 as part of the National Science Foundation (NSF)‐funded EarthScope ...
Emily E. Zawacki, Michael E. Jackson, Glen S. Mattioli, David J. Mencin, Karl Feaux, Donna J. Charlevoix   +5 more
wiley   +1 more source

Interaction of marine geodesy, satellite technology and ocean physics [PDF]

The possible applications of satellite technology in marine geodesy and geodetic related ocean physics were investigated. Four major problems were identified in the areas of geodesy and ocean physics: (1) geodetic positioning and control establishment ...
Fubara, D. M. J., Mourad, A. G.
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Bioclimatic Reorganization of Carbon–Water–Energy Coupling Revealed by Eddy Covariance and Interpretable Machine Learning

Global Change Biology Communications, Volume 1, Issue 2, June 2026.
Ecosystem carbon, water, and energy exchange reorganize systematically along climatic gradients from humid to dry conditions. Tapering shapes indicate shifts in the relative importance of environmental drivers and ecosystem fluxes across climate space, with thicker ends representing greater influence or magnitude.
Koong Yi, Margaret S. Torn, Gabriel B. Senay, Lixin Wang, Kosana Suvočarev, Joshua B. Fisher, Arman Ahmadi, Housen Chu, Gil Bohrer, Georgianne W. Moore, Stephen P. Good, Steven A. Kannenberg, Justine E. C. Missik, Kanishka Mallick, Kul Khand, Youngryel Ryu, Kuno Kasak, A. Christopher Oishi, David E. Reed, Xiangzhong Luo, Carl J. Bernacchi, Dennis D. Baldocchi   +21 more
wiley   +1 more source

Satellite applications to marine geodesy [PDF]

Potential use of satellites for enhancing positioning capabilities and for marine geodetic ...
Frazier, N. A., Holdahl, J. H., Hooper, A. T., Mourad, A. G., Someroski, F. W.   +4 more
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Satellite geodesy: Methods

Eos, Transactions American Geophysical Union, 1971
General Theory. Analytic solutions for the motion of a near‐earth satellite are of practical importance for orbit prediction and establishment of reference orbits I (intermediaries) for minimizing perturbations from which the geodetic information is extracted.
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Climate Controls on Carbon Dioxide Fluxes in a High‐Elevation Grassland

Global Change Biology Communications, Volume 1, Issue 2, June 2026.
Climate change is significantly influencing high‐elevation grasslands, possibly unbalancing CO2 exchanges and the sink‐source dynamics. Cumulated heat available for plant growth and vegetation cover were identified as the main controllers of phenological development and, via direct or mediated effects, of CO2 fluxes (ER and GPP).
Silvio Marta, Marta Magnani, Gianna Vivaldo, Andrea Mainetti, Ilaria Baneschi, Alice Baronetti, Simona Gennaro, Mariasilvia Giamberini, Simone Ravetto Enri, Michele Lonati, Brunella Raco, Antonello Provenzale   +11 more
wiley   +1 more source

DMA precise time and time interval requirements [PDF]

Defense Mapping Agency timing requirements ranging from milliseconds to tenths of nanoseconds and its use of geodetic astronomy and satellite geodesy programs are discussed in ...
Carnahan, R. H.
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Spherical Slepian functions and the polar gap in geodesy

, 2006
The estimation of potential fields such as the gravitational or magnetic potential at the surface of a spherical planet from noisy observations taken at an altitude over an incomplete portion of the globe is a classic example of an ill-posed inverse ...
Aki, Albertella, Bendat, Blakely, Cox, Dahlen, Edmonds, F. A. Dahlen, Frederik J. Simons, Gilbert, Grünbaum, Gubbins, Hinshaw, Hoerl, Hoerl, Holme, Holme, Jackson, Jordan, Lemoine, Lesur, Lowes, Mallat, Marquardt, Pail, Peebles, Percival, Santo, Simons, Slepian, Sneeuw, Stacey, Szegö, Tegmark, Tegmark, Thébault, Wieczorek, Wiggins, Wingham, Xu, Xu, Xu   +41 more
core   +2 more sources

An Overview of Tsunami Hazards in the Southwest Pacific Ocean

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.
The southwest Pacific region is geologically complex and exhibits all the principal causes of tsunami generation. While contemporary events and historical catalogs indicate that trans‐Pacific tsunamis have affected this area (∼18% of tsunamis reported globally), it is unique in that a large part of the tsunami effects over the ∼200‐year historical ...
Jean H. M. Roger, Bruce E. O. Thomas, Jose Borrero, Brook Tozer, Julien Collot, Samuel Etienne, Catherine Chagué, Patrick D. Nunn, Emily M. Lane, Shaun Williams, David Burbidge, Hannah E. Power, William Power, Bernard Pelletier   +13 more
wiley   +1 more source