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pro vyhledávání: '"Lars E. Sjöberg"'
Autor:
Lars E. Sjöberg
Publikováno v:
Geosciences, Vol 8, Iss 4, p 143 (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 e
Externí odkaz:
https://doaj.org/article/a808dce9663c4f1badb0c288edad3297
Autor:
Lars E. Sjöberg, Majid Abrehdary
Publikováno v:
Journal of Applied Geodesy. 16:331-339
Due to different structures of the Earth’s crust and mantle, there is a significant density contrast at their boundary, the Moho Density Contrast (or shortly MDC). Frequently one assumes that the MDC is about 600 kg/m3, but seismic and gravimetric
Autor:
Lars E. Sjöberg
Publikováno v:
Studia Geophysica et Geodaetica.
Autor:
Lars E. Sjöberg
Publikováno v:
Journal of Geodetic Science. 12:38-41
Recently a number of geoid campaigns were performed to verify different types of geoid and quasigeoid modeling techniques. Typically, GNSS-leveling was employed as an independent method, but in some cases zenith camera astronomic deflection data were
Autor:
Lars E. Sjöberg, Majid Abrehdary
The incomplete knowledge of the topographic density distribution causes a topographic bias in all gravimetric geoid determinations. This bias becomes critical in aiming for accurate geoid models in high mountainous regions. The bias can be divided in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d2096954f191f282f95a642b0897cb6
https://doi.org/10.1007/1345_2023_191
https://doi.org/10.1007/1345_2023_191
Autor:
Lars E. Sjöberg
Publikováno v:
Journal of Geodetic Science, Vol 11, Iss 1, Pp 1-6 (2021)
Arne Bjerhammar is well known worldwide mainly for his research in physical geodesy but also for introducing a new matrix algebra with generalized inverses applied in geodetic adjustment. Less known are his developments in geodetic engineering and co
Autor:
Majid Abrehdary, Lars E. Sjöberg
Publikováno v:
Journal of Applied Geodesy. 15:143-152
As crustal structure models based on seismic and other data are frequently used as a-priori information for further geophysical and geological studies and interpretations (e. g., for gravity inversion), it is important to accurately document their qu
Autor:
Jonas Ågren, Ropesh Goyal, Nagarajan Balasubramanian, Onkar Dikshit, Will Featherstone, Lars E. Sjöberg
Publikováno v:
Survey Review. 54:57-69
Since 2006, several different groups have computed geoid and/or quasigeoid (quasi/geoid) models for the Auvergne test area in central France using various approaches. In this contribution, we compu...
Publikováno v:
IEEE Transactions on Industry Applications. 56:6448-6455
In-wheel motors present a range of opportunities for innovation in electric vehicle design as the torque produced at each of two or four wheels can be controlled individually. A high-aspect ratio (large radius, short axial length) motor is required t
Publikováno v:
Advances in Space Research. 65:1922-1940
Time-varying spherical harmonic coefficients determined from the Gravity Recovery and Climate Experiment (GRACE) data provide a valuable source of information about the water mass exchange that is the main contributor to the Earth’s gravity field c