Results 11 to 20 of about 948 (186)
Combining EGM2008 with GOCE Gravity Models [PDF]
, 2013 The most advanced global gravity model, EGM2008, is nowadays competing with local models in terms of resolution and accuracy in the definition of the Earth gravity field. This global model, complete to spherical harmonic degree and order 2159, is however affected by several biases mainly due to datum inconsistencies and variability of the input ...
GILARDONI, MADDALENA +3 more
openaire +2 more sources
Computing the Deflection of the Vertical for Improving Aerial Surveys: A Comparison between EGM2008 and ITALGEO05 Estimates [PDF]
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 part of the observed scene; these errors can vary from a few tens of centimetres to over one meter ...
Giuseppina Prezioso +2 more
exaly +7 more sources
THE DEVELOPMENT AND VALIDATION OF AN EGM2008 GEOID MODEL FOR SENEGAL. [PDF]
International Journal of Advanced Research, 2019 In Senegal, the use of GPS Global Navigation Satellite Systems (GNSS) technology to give a planimetric position on the WGS84 ellipsoid has increased considerably in recent decades. However, the problem of altitude posed by this technology presents the engineers a complex obstacle, since it is necessary to determine with precision the orthometric ...
Alassane Ba , Ababacar Fall +1 more
core +5 more sources
GECO: a global gravity model by locally combining GOCE data and EGM2008 [PDF]
Studia Geophysica et Geodaetica, 2016 The EGM2008 model is nowadays one of the description of the global gravitational field at the highest resolution. It is delivered with two, not fully consistent, sources of information on its error: spherical harmonic coefficient variances and a geographical map of error variances, e.g. in terms of geoid undulation.
GILARDONI, MADDALENA +2 more
openaire +5 more sources
A High-Resolution Earth’s Gravity Field Model SGG-UGM-2 from GOCE, GRACE, Satellite Altimetry, and EGM2008 [PDF]
Engineering, 2020 This paper focuses on estimating a new high-resolution Earth’s gravity field model named SGG-UGM-2 from satellite gravimetry, satellite altimetry, and Earth Gravitational Model 2008 (EGM2008)-derived gravity data based on the theory of the ellipsoidal ...
Wei Liang +4 more
doaj +2 more sources
ADAPTATION OF THE GLOBAL GEOID MODEL EGM2008 ON CAMPANIA REGION (ITALY) BASED ON GEODETIC NETWORK POINTS [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021 Abstract. The knowledge of the geoid undulation, the height of the geoid relative to a given ellipsoid of reference, is fundamental to transform the ellipsoidal heights into orthometric heights. Global geoid undulation models developed from satellite gravity measurements appropriately integrated with other data, are free accessible in internet, but ...
Ferrara G., Parente C.
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Testing EGM2008 on Leveling Data from Scandinavia, Adjacent Baltic Areas, and Greenland [PDF]
, 2010 We tested EGM2008 on GPS/leveling data from Scandinavia and adjacent areas. EGM2008 performs at the same level as the best regional geoid model, NKG2004. However, the direct evaluation of EGM2008 is difficult in Greenland because no leveling data are available. Nevertheless, we show on 78 GPS-MSS data that EGM2008 also performs at the same level as the
G. Strykowski, R. Forsberg
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An Algorithm for Strapdown Airborne Gravity Disturbance Vector Measurement Based on High-Precision Navigation and EGM2008. [PDF]
Sensors (Basel)Attitude errors, accelerometer bias, the gravity disturbance vector, and their coupling are the primary factors obstructing strapdown airborne vector gravimetry. This paper takes the geocentric inertial frame as a reference and solves the kinematic equations of its motion and its errors of the body frame and local geographic frame in the Lie group ...
Fang K, Cai T.
europepmc +6 more sources
Analyse des globalen Geopotentialmodells EGM2008 und des Europäischen Geoids EGG08 [PDF]
, 2014 There are several gravitational models for geodetic, geophysical or oceanographic applications and investigations. Usually these are spherical harmonic models of the Earth-s gravitational potential, which are developed by a combination of satellite tracking data, satellite altimeter data and gridded mean free-air anomalies. More detailed regional geoid
Seiser, Patrick
openaire +3 more sources
On the determination of a new combined EGM2008 based quasi-geoid model for Hungary [PDF]
Acta Geodaetica et Geophysica Hungarica, 2011 A new quasi-geoid model for Hungary was determined by combining gravity data, GPS/levelling and vertical deflections. Reduction of the measurements was performed by using Earth Gravitational Model 2008 (EGM2008) and Shuttle Radar Topographic Mission (SRTM) elevation data sets.
Tóth, Gy, Szűcs, E.
openaire +3 more sources