Results 71 to 80 of about 2,043 (261)
ISPRS International Journal of Geo-InformationThe 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 +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
Transactions in GIS, Volume 30, Issue 5, August 2026.ABSTRACT In sampling‐based process, sample size is always a debated topic. To assess positional accuracy using points, there are several studies and standards that determine what sample size should be used. However, for positional control using lines, there is no knowledge of a study that indicates the sample size.
Marconi Martins Cunha +3 more
wiley +1 more source
Application of GNSS Integrated Technology to Safety of Inland Water Navigation [PDF]
TransNav, 2007 In the paper the description of some applications of satellite integrated technology, elaborated in the Chair of Satellite Geodesy and Navigation of University of Warmia and Mazury in Olsztyn, to bathymetric survey of Great Masurian Lakes is given.
Dariusz Popielarczyk, Stanislaw Oszczak
doaj
Gravimetric estimation of the Eötv¨ös matrix components
Contributions to Geophysics and Geodesy, 2017 The components of the Eötvös matrix are useful for various geodetic applications, such as interpolation of the elements of the deflection of the vertical, determination of gravity anomalies and determination of geoid heights. A torsion balance instrument
Gerassimos MANOUSSAKIS +2 more
doaj +1 more source
Totally elliptic surface group representations
Bulletin of the London Mathematical Society, Volume 58, Issue 8, August 2026.Abstract A surface group representation into a Lie group is totally elliptic if every simple closed curve on the surface is mapped to an elliptic element. In this note, we characterize all totally elliptic surface group representations into PSL2R$\operatorname{PSL}_2 \mathbb {R}$ and PSL2C$\operatorname{PSL}_2\mathbb {C}$ by showing that they are ...
Arnaud Maret
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.Abstract Unsustainable rates of groundwater (GW) depletion make GW management a priority. Effective GW management is hindered by the uncertainty in the predictions of aquifer models, but the increase of geodetic surface deformation data can improve aquifer characterization.
Amal Alghamdi +3 more
wiley +1 more source
Neural Spatiotemporal Interpolation for Gap Filling of GNSS-R Soil Moisture Data
IEEE Journal of Selected Topics in Applied Earth Observations and Remote SensingSpaceborne Global Navigation Satellite System Reflectometry (GNSS-R) provides L-band observations suitable for soil moisture retrieval and monitoring, but the resulting datasets are inherently sparse in space and time. Many applications, however, benefit
Oto Alves +4 more
doaj +1 more source
A numerical test of the topographic bias
Journal of Geodetic Science, 2018 In 1962 A. Bjerhammar introduced the method of analytical continuation in physical geodesy, implying that surface gravity anomalies are downward continued into the topographic masses down to an internal sphere (the Bjerhammar sphere).
Sjöberg L.E., Joud M.S.S.
doaj +1 more source
Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.Abstract During an earthquake a dynamic rupture propagates, causing fractures and permanent damage that modify the mechanical properties of the fault and its surroundings. Reciprocally, the energy dissipated by the mechanical transformation of the fault rock has a direct feedback on the dynamics of the seismic rupture.
A. R. Vishnu +5 more
wiley +1 more source