Results 41 to 50 of about 3,699 (225)
Water surface height determination with a GPS wave glider: a demonstration in Loch Ness, Scotland [PDF]
, 2016 A geodetic GPS receiver has been installed on a Wave Glider, an unmanned water surface vehicle. Using kinematic precise point positioning (PPP) GPS, which operates globally without directly requiring reference stations, surface heights are measured with ~
Foden, P.R. +5 more
core +1 more source
Improvement of GOCE-Based Global Geopotential Models for Gravimetric Geoid Modeling in Turkey
Geosciences, 2022 This study investigates the contribution of global geopotential models which are calculated with GOCE satellite mission data to the improvement of gravimetric geoid models in Turkey.
Mustafa Serkan Isik +3 more
doaj +1 more source
Covariance function modelling in local geodetic applications using the simplex method [PDF]
, 2016 Collocation has been widely applied in geodesy for estimating the gravity field of the Earth both locally and globally. Particularly, this is the standard geodetic method used to combine all the available data to get an integrated estimate of any ...
Barzaghi, Riccardo +4 more
core +3 more sources
Evaluation of EGM2008 by means of GPS Levelling Uganda
South African Journal of Geomatics, 2014 The global gravity model EGM2008 is evaluated in various regions of Uganda to assess if it is good enough for geodetic applications. The evaluation method involves comparison of geoid heights computed from the model with those computed at irregularly distributed GPS Levelling stations.
Abeho, DR, Hipkin, R, Tulu, BB
openaire +3 more sources
On the Accuracy of EGM2008 with Measured Data Based on Strap-down Airborne Gravimetry [PDF]
Proceedings of the 2015 2nd International Workshop on Materials Engineering and Computer Sciences, 2015 Gravity survey is an important research topic in geophysics and geodynamics. This paper analyzes the accuracy of EGM2008, the newest Earth gravitational model, in two areas in Shandong Province of China. By comparing the gravity anomaly data from the model with those obtained by a strap-down airborne gravimeter called SGA-WZ, it shows that error ...
Shaokun Cai, Meiping Wu, Shaoliang Li
openaire +1 more source
ANALYSIS OF THE GRAVITY MODELS IMPACT ON LEO SATELLITE ORBIT PREDICTION [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022 Non-spherical gravity plays a crucial role in the LEO satellite orbit determination and prediction. In recent years, several new gravity models have been proposed with more comprehensive ground and space-borne data.
Y. Zhuang, L. Wang
doaj +1 more source
Vertical Deflections and Gravity Disturbances Derived from HY-2A Data
Remote Sensing, 2020 The first Chinese altimetry satellite, Haiyang-2A (HY-2A), which was launched in 2011, has provided a large amount of sea surface heights which can be used to derive marine gravity field.
Xiaoyun Wan +3 more
doaj +1 more source
Conservative evaluation of the uncertainty in the LAGEOS-LAGEOS II Lense-Thirring test
, 2009 We deal with the test of the general relativistic gravitomagnetic Lense-Thirring effect currently ongoing in the Earth's gravitational field with the combined nodes \Omega of the laser-ranged geodetic satellites LAGEOS and LAGEOS II.
A. Milani +47 more
core +1 more source
Terrestrial, Atmospheric and Oceanic Sciences, 2013 In this paper we present the concepts and realization of the shallow-layer Shen geoid determination method, which is quite different from the classical geoid modeling methods (Stokes¡¦ method, Molodenskii¡¦s method, etc.), for determining the global or ...
WenBin Shen Jiancheng Han
doaj +1 more source
Terrestrial, Atmospheric and Oceanic Sciences, 2022 This study validates the ultra-high-degree gravity field models in terms of the internal error estimate and the external precision. Internal error estimate is evaluated by geoid error degree variance and cumulative geoid height errors.
Huaqing Yuan +4 more
doaj +1 more source