Results 31 to 40 of about 1,044,226 (312)

Comparison of Current Gravity Estimation and Determination Models [PDF]

, 2018
This paper will discuss the history of gravity estimation and determination models while analyzing methods that are in development. Some fundamental methods for calculating the gravity field include spherical harmonics solutions, local weighted ...
Hillman, Kyle
core   +1 more source

On global and regional spectral evaluation of global geopotential models

Journal of Geophysics and Engineering, 2010
Spectral evaluation of global geopotential models (GGMs) is necessary to recognize the behaviour of gravity signal and its error recorded in spherical harmonic coefficients and associated standard deviations. Results put forward in this wise explain the whole contribution of gravity data in different kinds that represent various sections of the gravity
Ustun, A., Abbak, R.
openaire   +4 more sources

A Shallow-water Model Exploration of Atmospheric Circulation on Sub-Neptunes: Effects of Radiative Forcing and Rotation Period

The Planetary Science Journal, 2023
Sub-Neptune-type exoplanets are abundant in our Galaxy yet have no solar system analogs. They exist in a broad range of stellar forcing and rotational regimes that are distinctly different from solar system planets and more commonly studied hot Jupiters.
Ekaterina Landgren, Alice Nadeau, Nikole Lewis, Tiffany Kataria, Peter Hitchcock   +4 more
doaj   +1 more source

Forecast Assessment of CMA-GFS on the Meteorological Elements in the Northeast Hemisphere

Gaoyuan qixiang, 2023
Based on the daily forecast data initialized at 20:00 （Beijing time） of the CMA global forecast system （CMA-GFS） during the period from October， 2019 to December， 2020， the forecasting quality of the upper air meteorological elements in the Northeast ...
Chunjuan QI, Liujie PAN
doaj   +1 more source

Assessment of high-degree reference models and Recent Goce/Grace Global Geopotential Models over Sudan based on the GPS/Leveling data

IOP Conference Series: Earth and Environment, 2021
Nowadays, Global Geopotential Models (GGMs) can be used as a reference to develop more detailed regional/local geoids, or they can be used to provide geoid heights on their own.
Anas Osman, I. M. Anjasmara, Abdelrahim Ruby, Zahroh Arsy Udama   +3 more
semanticscholar   +1 more source

A High-Resolution Gravimetric Geoid Model for Kuwait Using the Least-Squares Collocation

Frontiers in Earth Science, 2022
A new gravimetric geoid model, the KW-FLGM2021, is developed for Kuwait in this study. This new geoid model is driven by a combination of the XGM2019e-combined global geopotential model (GGM), terrestrial gravity, and the SRTM 3 global digital elevation ...
Hamad Al-Ajami, Hamad Al-Ajami, Ahmed Zaki, Mostafa Rabah, Mohamed El-Ashquer   +4 more
doaj   +1 more source

Research on gravity field modelling and gravimetry in Poland in 2015–2018 [PDF]

Geodesy and Cartography, 2019
Activities of the Polish research gSDroups concerning gravity field modelling and gravimetry in a period of 2015–2018 are reviewed and summarised in this paper.
Jan Krynski, Przemyslaw Dykowski, Tomasz Olszak   +2 more
doaj   +1 more source

Computing the Deflection of the Vertical for Improving Aerial Surveys: A Comparison between EGM2008 and ITALGEO05 Estimates

Sensors, 2016
Recent studies on the influence of the anomalous gravity field in GNSS/INS applications have shown that neglecting the impact of the deflection of vertical in aerial surveys induces horizontal and vertical errors in the measurement of an object that is ...
Riccardo Barzaghi, Daniela Carrion, Massimiliano Pepe, Giuseppina Prezioso   +3 more
doaj   +1 more source

Spectrally Consistent Mean Dynamic Topography by Combining Mean Sea Surface and Global Geopotential Model Through a Least Squares-Based Approach

Frontiers in Earth Science, 2022
The filtering procedure is usually mandatory for modeling mean dynamic topography (MDT) when a geodetic approach based on the Mean Sea Surface (MSS) and the Global Geopotential Model (GGM) is used.
Hongkai Shi, Hongkai Shi, Xiufeng He, Yihao Wu, Ole Baltazar Andersen, Per Knudsen, Yanxiong Liu, Zhetao Zhang   +7 more
doaj   +1 more source

A Tropospheric Assessment of the ERA-40, NCEP, and JRA-25 Global Reanalyses in the Polar Regions [PDF]

, 2007
The reliability of the global reanalyses in the polar regions is investigated. The overview stems from an April 2006 Scientific Committee on Antarctic Research (SCAR) workshop on the performance of global reanalyses in high latitudes held at the British ...
Adler, Andersson, Baldwin, Bengtsson, Bengtsson, Bengtsson, Bromwich, Bromwich, Bromwich, Bromwich, Bromwich, Crochet, Cullather, David H. Bromwich, Déry, Fogt, Francis, Gong, Hanna, Hines, Hodges, Hodges, Hoskins, Hoskins, Ishii, John E. Walsh, Kalnay, Kanamitsu, Kevin I. Hodges, Kidson, Kistler, L'Heureux, Marshall, Marshall, Marshall, Monaghan, Onogi, Raphael, Renwick, Richman, Ryan L. Fogt, Schubert, Serreze, Serreze, Serreze, Serreze, Serreze, Serreze, Serreze, Serreze, Sterl, Sturaro, Su, Tennant, Thompson, Trenberth, Trenberth, Turner, Uppala, van de Berg, van de Berg, Vaughan, Walsh, Wang   +63 more
core   +1 more source