Results 11 to 20 of about 32,946 (237)

Advancements of Geodetic Activities in Nepal: A Review on Pre- and Post-2015 Gorkha Earthquake Eras with Future Directions

Remote Sensing, 2022
From celestial objects to every feature on Earth, geodesy provides a reference frame and is the foundation for surveying, mapping, and other geoscience activities.
Shanker KC, Tri Dev Acharya
doaj   +1 more source

Strategy for the realisation of the International Height Reference System (IHRS)

Journal of Geodesy, 2021
In 2015, the International Association of Geodesy defined the International Height Reference System (IHRS) as the conventional gravity field-related global height system. The IHRS is a geopotential reference system co-rotating with the Earth. Coordinates
Laura Sánchez, J. Ågren, Jianliang Huang, Yan Ming Wang, J. Mäkinen, Roland Pail, R. Barzaghi, Georgios S. Vergos, K. Ahlgren, Qing Liu   +9 more
semanticscholar   +1 more source

On the connection of the Ecuadorian Vertical Datum to the IHRS

Journal of Geodetic Science, 2023
In this work, the determination of the discrepancy between the Ecuadorian Vertical Datum (EVD) and the International Height Reference System (IHRS) is presented.
Carrión José L., de Freitas Sílvio R. Correia, Barzaghi Riccardo   +2 more
doaj   +1 more source

VLBI TRF Combination Using GNSS Software [PDF]

Journal of Astronomy and Space Sciences, 2013
Space geodetic techniques can be used to obtain precise shape and rotation information of the Earth. To achieve this, the representative combination solution of each space geodetic technique has to be produced, and then those solutions need to be ...
Younghee Kwak, Jungho Cho
doaj   +1 more source

Assessment of hybrid geoids in Chile and Spain, combining GGM and GNSS/Leveling observations

Geodesy and Geodynamics, 2021
This research presents the results for analyses done to five geopotential global models (GGM), comparing them with ground data from GNSS and leveling in heterogenic zones from the geodetic perspective, in Chile and Spain.
José Antonio Tarrío Mosquera, Marcelo Caverlotti Silva, Fernando Isla, Carlos Prado   +3 more
doaj   +1 more source

Analysis of high-resolution global gravity field models for the estimation of International Height Reference System (IHRS) coordinates in Argentina

Journal of Geodetic Science, 2022
Following the definition and realization of the International Height Reference System (IHRS), the vertical coordinate of a given point at the Earth’s surface can be obtained from the computation of the geopotential value from a harmonic expansion of a ...
Tocho Claudia N., Antokoletz Ezequiel D., Gómez Agustín R., Guagni Hernán, Piñon Diego A.   +4 more
doaj   +1 more source

Statistical validation of ionospheric electron density profiles retrievals from GOES geosynchronous satellites

Journal of Space Weather and Space Climate, 2023
In this paper, we discuss a novel retrieval of ionospheric electron density profiles using the Radio Occultation (RO) technique applied to measurements captured by the Global Positioning System (GPS) receivers onboard two Geostationary Operational ...
Zakharenkova Irina, Cherniak Iurii, Gleason Scott, Hunt Douglas, Freesland Douglas, Krimchansky Alexander, McCorkel Joel, Ramsey Graeme, Chapel Jim   +8 more
doaj   +1 more source

A first solution for the International Height Reference Frame (IHRF)

, 2023
The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)
Sánchez, L., Ihrf computation team, o.
openaire   +2 more sources

CFD SIMULATION MODEL FOR MIXING TANK USING MULTIPLE REFERENCE FRAME (MRF) IMPELLER ROTATION

International Journal of Technical Research & Science, 2020
In this work, CFD (Computational Fluid Dynamics) simulations have been conducted to investigate flow behavior of water in fully baffled stirred tank employed with Rushton impeller.
Ansar Ali, T. Devi
semanticscholar   +1 more source

A Relativistic Geodetic Approach to Unify the Height System for Africa

Mansoura Engineering Journal, 2023
This study focuses on the establishment of a uni fi ed height system for Africa called African Uni fi ed Height System (AFRUHS) by utilizing atomic eight clocks and clock networks. The International Association of Geodesy has nine long aims to construct an
M. Ashry, Wenbin Shen, Abdelrahim Ruby, Pengfei Zhang, Ziyu Shen, H. Abd-Elmotaal, M. Abd-Elbaky, A. Makhloof   +7 more
semanticscholar   +1 more source