Results 51 to 60 of about 914 (138)

Indirect evaluation of Mars Gravity Model 2011 using a replication experiment on Earth [PDF]

, 2012
Curtin University’s Mars Gravity Model 2011 (MGM2011) is a high-resolution composite set of gravity field functionals that uses topography-implied gravity effects at medium- and short-scales (~125 km to ~3 km) to augment the space-collected MRO110B2 ...
A.A. Ardalan, A.B. Watts, A.S. Konopliv, B. Bürki, B.D. Tapley, C. Hirt, C. Hirt, C. Hirt, C. Hirt, C. Hirt, C. Jekeli, Christian Hirt, D. Nagy, D. Nagy, D.A. Smith, D.E. Smith, F. Göttl, H. Moritz, H. Moritz, K.-P. Schwarz, M.A. Wieczorek, M.A. Wieczorek, Michael Kuhn, NGS, NGS, NRC, R. Forsberg, R. Pail, R. Rummel, R. Rummel, R.H. Rapp, Sten J. Claessens, W. Torge, W.E. Featherstone, Will E. Featherstone, Y.M. Wang   +35 more
core   +1 more source

How to Find Accurate Terrain and Canopy Height GEDI Footprints in Temperate Forests and Grasslands?

Earth and Space Science, Volume 11, Issue 10, October 2024.
Abstract Filtering approaches on Global Ecosystem Dynamics Investigation (GEDI) data differ considerably across existing studies and it is yet unclear which method is the most effective. We conducted an in‐depth analysis of GEDI's vertical accuracy in mapping terrain and canopy heights across three study sites in temperate forests and grasslands in ...
Vítězslav Moudrý, Jiří Prošek, Suzanne Marselis, Jana Marešová, Eliška Šárovcová, Kateřina Gdulová, Giorgi Kozhoridze, Michele Torresani, Duccio Rocchini, Anette Eltner, Xiao Liu, Markéta Potůčková, Adéla Šedová, Pablo Crespo‐Peremarch, Jesús Torralba, Luis A. Ruiz, Michela Perrone, Olga Špatenková, Jan Wild   +18 more
wiley   +1 more source

ETH-GQS: An estimation of geoid-to-quasigeoid separation over Ethiopia

Geodesy and Geodynamics, 2022
The determination of accurate orthometric or normal heights remains one of the main challenges for the geodetic community in Ethiopia. These heights are required for geodetic and geodynamic scientific research as well as for extensive engineering ...
Ephrem Y. Belay, Walyeldeen Godah, Malgorzata Szelachowska, Robert Tenzer   +3 more
doaj   +1 more source

A nehézségi erőtér regionális szerkezetének kutatása új típusú földi és szatellita mérések bevonásával = Regional gravity field research by using new kinds of terrestrial and satellite measurements [PDF]

, 2008
A vizsgálatainkat a magyarországi geoidmeghatározás, a geoidfelület interpoláció, továbbá a GOCE gradiométeres műhold jövőbeni méréseinek felhasználása főbb területein végeztük.
Benedek, Judit, Biró, Péter, Kenyeres, Ambrus, Kratochvilla, Krisztina, Papp, Gábor, Rózsa, Szabolcs, Tóth, Gyula, Völgyesi, Lajos, Zaletnyik, Piroska, Ádám, József   +9 more
core  

Interpolation Grid for Local Area of Iasi City

Present Environment and Sustainable Development, 2014
Definitive transition to GNSS technology of achieving geodetic networks for cadastre implementation in cities and municipalities, enforce establishing a unique way of linking between current measurements and existing geodetic data, with a sufficient ...
Mihalache Raluca Maria, Manescu Andreea
doaj   +1 more source

Proposed Methodology for Accuracy Improvement of LOD1 3D Building Models Created Based on Stereo Pléiades Satellite Imagery

Remote Sensing, 2022
Three-dimensional city models play an important role for a large number of applications in urban environments, and thus it is of high interest to create them automatically, accurately and in a cost-effective manner.
Ana-Ioana Breaban, Valeria-Ersilia Oniga, Constantin Chirila, Ana-Maria Loghin, Norbert Pfeifer, Mihaela Macovei, Alina-Mihaela Nicuta Precul   +6 more
doaj   +1 more source

Compilation of the regional quasigeoid model for New Zealand using the discretised integral-equation approach

Journal of Geodetic Science, 2012
We evaluate the new regional quasigeoid model (OTG12) for New Zealand using the method which utilises the discretised integral equation approach for computing the near-zone contribution.
Abdalla A., Tenzer R.
doaj   +1 more source

Astronomical-topographic levelling using high-precision astrogeodetic vertical deflections and digital terrain model data [PDF]

, 2009
At the beginning of the twenty-first century, a technological change took place in geodetic astronomy by the development of Digital Zenith Camera Systems (DZCS).
Flury, J., Hirt, Christian
core   +1 more source

The AUSGeoid09 model of the Australian Height Datum [PDF]

, 2010
AUSGeoid09 is the new Australia-wide gravimetric quasigeoid model that has been a posteriori fitted to the Australian Height Datum (AHD) so as to provide a product that is practically useful for the more direct determination of AHD heights from Global ...
Brown, N., Claessens, Sten, Featherstone, Will, Filmer, Michael, Hirt, Christian, Hu, Guorong, Johnston, G., Kirby, Jonathan   +7 more
core   +1 more source

Towards a geoid consistent vertical datum in South Africa [PDF]

, 2022
Traditionally, vertical datums have been realised through mean sea level (MSL) data, at one or more tide gauge station(s), followed by a precise levelling procedure to establish a network of benchmarks.
Mphuthi, Matthews Siphiwe
core   +1 more source