Results 31 to 40 of about 1,485 (143)
Geodesy and Geodynamics, 2015 Earth's gravity model (EGM) helps people better determine the figure of Earth, which is generally represented by a global geoid. For a considerable amount of practical applications, people use quasi-geoid to approximate the geoid, thus the quasi-geoid is
Jin Li, WenBin Shen, Xuhua Zhou
doaj +1 more source
Journal of Geodetic Science, 2023 The transformation of coordinates between different geodetic datums has been a common practice within the geospatial profession. Relating different geodetic datums mostly involves the use of conformal transformation techniques, which could produce ...
Kheloufi Noureddine, Dehni Abdellatif
doaj +1 more source
A new methodology to manage Italian geodetic datums of the cadastral systems and of the historic maps [PDF]
, 2013 Cadastral maps represent the result of the highest scale survey of any region. They are not topographic maps. Their goal is to show the property system of the mapped area, so any topographic element that is important for this aspect is shown while others
Baiocchi, Valerio +2 more
core +1 more source
The sand grain and the butterfly. Instability in geodesy and geophysics
Annals of Geophysics, 1997 The problems of convergence of series in celestial mechanics and of certain series in geodesy (Molodensky's series and spherical harmonics) show similar features, involving a curious instability. This is imaginatively expressed as the « butterfly effect»
H. Moritz
doaj +1 more source
Nonlinear force-free models for the solar corona I. Two active regions with very different structure [PDF]
, 2007 With the development of new instrumentation providing measurements of solar photospheric vector magnetic fields, we need to develop our understanding of the effects of current density on coronal magnetic field configurations.
Alissandrakis +51 more
core +2 more sources
On the transformation of the coordinates of points from the SK-42 system to WGS-84
Геофизический журнал, 2019 The significant and effective use of global positioning satellite systems for solution of important theoretical and applied problems of Earth sciences means the preserving of the possibility to use a huge quantity of geodetic, cartographic, gravimetric ...
A. I. Yakimchik
doaj +1 more source
GEOID-QUASIGEOID CORRECTION IN FORMULATION OF THE FUNDAMENTAL FORMULA OF PHYSICAL GEODESY [PDF]
Revista Brasileira de Cartografia, 2003 To formulate the fundamental formula of physical geodesy at the physical surface of the Earth, the gravity anomalies are used instead of the gravity disturbances, because the geodetic heights above the geocentric reference ellipsoid are not usually ...
Petr Vanícek, Robert Tenzer
doaj
Contributions to Geophysics and Geodesy, 2016 The vertical reference system in the Slovak Republic is realized by the National Levelling Network (NLN). The normal heights according to Molodensky have been introduced as reference heights in the NLN in 1957.
Miroslava MAJKRÁKOVÁ +5 more
doaj +1 more source
A Brief Overview to Theory of Heights
Communications, 2002 In various parts of the world many kinds of height systems have been formulated and practically used in the past. Nowadays, orthometric heights and normal heights are widely used.
Robert Tenzer
doaj +1 more source
Causal Relationships between Eruptive Prominences and Coronal Mass Ejections [PDF]
, 2007 A close association between eruptive prominences and CMEs, both slow and fast CMEs, was reported in many studies. Sometimes it is possible to follow the material motion starting from the prominence (filament) activation to the CME in the high corona ...
Filippov, Boris, Koutchmy, Serge
core +4 more sources