Results 31 to 40 of about 285 (165)

STRATEGIES FOR THE ACCURATE DETERMINATION OF ORTHOMETRIC HEIGHTS FROM GPS [PDF]

Survey Review, 1998
AbstractIn order for Global Positioning System (GPS) derived ellipsoidal heights to have any physical meaning in a surveying or engineering application, they must be transformed to orthometric heights. A practical approach is presented where gravimetrically and geometrically derived geoid heights are combined to accurately recover orthometric heights ...
Featherstone, Will, Dentith, M., Kirby, Jon   +2 more
openaire   +2 more sources

On the Accurate Determination of the Orthometric Correction to Levelled Height Differences—A Case Study in Hong Kong

Geomatics
Orthometric heights are practically determined from levelling and gravity measurements by applying orthometric corrections to levelled height differences.
Robert Tenzer, Albertini Nsiah Ababio, Ismael Foroughi, Martin Pitoňák, Pavel Novák, Wenjin Chen, Franck Eitel Kemgang Ghomsi   +6 more
doaj   +1 more source

Local Geoid height calculations with GNSS, airborne, and spaceborne Lidar data

Egyptian Journal of Remote Sensing and Space Sciences, 2023
Determining the exact position of objects on the Earth’s surface is extremely important. The general purpose of this study is to calculate local geoid and orthometric heights of points obtained from ICESat-2/ATLAS, airborne LIDAR, and GNSS/CORS data and ...
Muge Agca, Ali Ihsan Daloglu
doaj   +1 more source

Uvedba novega slovenskega višinskega sistema (SVS2010) ( = Implementation of the new Slovenian Height System (SVS2010)) [PDF]

Geodetski Vestnik, 2020
Recently, a new national height reference system was implemented: the Slovenian Height System 2010 (SVS2010). This new system replaced the Slovenian Height System 2000 (SVS2000).
Klemen Medved, Klemen Kozmus Trajkovski, Sandi Berk, Bojan Stopar, Božo Koler   +4 more
doaj   +1 more source

High‐Resolution Digital Terrain Model and Land‐Surface Parameters of São Sebastião and Ilhabela, Southeastern Brazil

Geoscience Data Journal, Volume 13, Issue 2, April 2026.
The first openly accessible 2 m‐resolution lidar‐based DTM and an extensive set of land‐surface parameters (LSPs) for the region of São Sebastião and Ilhabela, southeastern Brazil, reveal geomorphological features previously indiscernible, including past landslide deposits, drainage captures and structural lineaments.
Rebeca Durço Coelho, Gabriella Labate Frugis, Camila Duelis Viana, Carlos Henrique Grohmann   +3 more
wiley   +1 more source

Modeling difference of reference surfaces of the Earth's body to solve the problem of vertical positioning [PDF]

Tehnika, 2016
The aim of this paper is modeling difference of reference surfaces of the Earth's body to solve the problem of vertical positioning. With development of GNSS technology determining geoid undulation obtained scientific and practical significance ...
Tucikešić Sanja S., Jakovljević Gordana L., Gučević Jelena P.   +2 more
doaj   +1 more source

Test of Determining Geopotential Difference between Two Sites at Wuhan Based on Optical Clocks’ Frequency Comparisons

Remote Sensing, 2022
Applications of optical clocks in physical geodesy for determining geopotential are of increasing interest to scientists as the accuracy of optical clocks improves and the clock size becomes more and more compact.
Anh The Hoang, Ziyu Shen, Kuangchao Wu, An Ning, Wenbin Shen   +4 more
doaj   +1 more source

Evaluating SWOT in the Coastal Zone: Comparisons With Tide Gauge and Airborne LiDAR in the Bristol Channel and Severn Estuary, UK

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Traditional nadir altimeters struggle with coastal water surface elevation (WSE) measurement and fine‐scale river‐estuary interactions, due to land‐water signal interference and their wide inter‐track spacing. The wide‐swath Surface Water and Ocean Topography (SWOT) mission, using a new Ka‐band radar interferometer, aims to address these ...
Youtong Rong, Paul Bates, Jeff Neal, Paul Bell, Christine Gommenginger, Ian Dougal Lichtman, Christopher Banks, Francisco J. M. Calafat, Adrien Martin, Jennifer Brown, Richard Cooke, Christopher Balfour, Michela De Dominicis, Marta Payo Payo, Simon Williams, Laurent Amoudry, Stephen Chuter, Simon Neill, Jude Chisholm, Colin J. Gleason, John Kupiec, Matt Lewis   +21 more
wiley   +1 more source

The effect of EGM2008-based normal, normal-orthometric and Helmert orthometric height systems on the Australian levelling network [PDF]

Journal of Geodesy, 2010
This paper investigates the normal-orthometric correction used in the definition of the Australian Height Datum, and also computes and evaluates normal and Helmert orthometric corrections for the Australian National Levelling Network (ANLN). Testing these corrections in Australia is important to establish which height system is most appropriate for any
Filmer, Michael, Featherstone, Will, Kuhn, Michael   +2 more
openaire   +2 more sources

Spaceborne Canopy Height Products Should Be Complemented With Airborne Laser Scanning Data: Toward a European Canopy Height Model

Earth and Space Science, Volume 13, Issue 1, January 2026.
Abstract Measuring and mapping vegetation structure is essential for understanding the functioning of terrestrial ecosystems and for informing environmental policies. Recent years have seen a growing demand for high‐resolution data on vegetation structure, driving their prediction at fine resolutions (1–30 m) at state, continental, and global spatial ...
Vítězslav Moudrý, Ruben Remelgado, Matthias Forkel, Michele Torresani, Gaia Vaglio Laurin, Eliška Šárovcová, Virginia E. Garcia Millan, Fabian Jörg Fischer, Tommaso Jucker, Michal Gallay, Patrick Kacic, Christopher R. Hakkenberg, Žiga Kokalj, Krzysztof Stereńczak, Yousef Erfanifard, Duccio Rocchini, Jiří Prošek, Stephanie Roilo, Kateřina Gdulová, Anna F. Cord, Michela Perrone, Juan Alberto Molina‐Valero, Jiří Šmída, Peter Surový, Zlatica Melichová, Marco Malavasi, Rudolf Urban, Martin Štroner, Dominik Seidel, Szilárd Szabó, László Bertalan, Anette Eltner, Roberto Cazzolla Gatti, Ján Kaňuk, Vojtěch Barták, Daniel Franke, Benjamin Brede, Qian Song, Mikhail Urbazaev, W. Daniel Kissling   +39 more
wiley   +1 more source