Results 11 to 20 of about 6,954 (297)

Downward continuation of airborne geomagnetic data based on two iterative regularization methods in the frequency domain

open access: yesGeodesy and Geodynamics, 2015
Downward continuation is a key step in processing airborne geomagnetic data. However, downward continuation is a typically ill-posed problem because its computation is unstable; thus, regularization methods are needed to realize effective continuation ...
Xiaogang Liu   +3 more
doaj   +2 more sources

Downward continuation of airborne gravimetry data based on Poisson integral iteration method

open access: yesGeodesy and Geodynamics, 2017
The research and application of airborne gravimetry technology has become one of the hottest topics in gravity field in recent years. Downward continuation is one of the key steps in airborne gravimetry data processing, and the quality of continuation ...
Xiaogang Liu   +3 more
doaj   +2 more sources

Far-zone contributions of airborne gravity anomalies' upward/downward continuation

open access: yesGeodesy and Geodynamics, 2016
Airborne gravimetry has become a vital technique in local gravity field approximation, and upward/downward continuation of gravity data is a key process of airborne gravimetry.
Boyang Zhou   +3 more
doaj   +2 more sources

Study on the stable and high-precision downward extension method of airborne gravity anomaly data [PDF]

open access: yes地球与行星物理论评
The essence of the downward continuation of airborne gravity anomalies is to solve the first kind of Fredholm integral equation, which is an ill-posed problem. Stable and high-precision downward continuation methods have always been a research hotspot in
Baogui Ke   +4 more
doaj   +2 more sources

A Recursive Truncated Taylor Expansion Downward Continuation Method for Geomagnetic Field

open access: yesApplied Sciences
In aeromagnetic detection and geomagnetic navigation, the reference geomagnetic maps usually need to be continued to different altitudes. Traditionally, the geomagnetic field upward continuation is stable.
Ke Wan   +9 more
doaj   +2 more sources

Topography-Assisted downward Continuation of Airborne Gravity: An Application for Geoid Determination in Taiwan

open access: yesTerrestrial, Atmospheric and Oceanic Sciences, 2010
We investigated the Fourier transform-based downward continuation (DWC) of airborne gravity anomalies around Taiwan assisted by topographic information. The topographic data are from the latest collections of elevations and ocean depths.
Yu-Shen Hsiao Cheinway Hwang
doaj   +2 more sources

The downward continuation of the disturbing potential based on poisson's integral

open access: yesUniciencia, 2004
En este artículo se prueban y valoran dos métodos diferentes para la realización de la continuación descendente de potencial perturbante. La importancia del potencial perturbante en geodesia reside en que éste es fundamental en la determinación del ...
Juan G. Serpas
doaj   +1 more source

Harmonic downward continuation of gravity anomalies

open access: yes, 2018
The question we would like to address is: Can any of the gravity anomalies (free-air, Fay, Bouguer, Helmert, etc.), multiplied by the radius r, be continued downward, using the (only rigorous) Poisson approach?
Vanícek, Petr
openaire   +4 more sources

Upward and downward statistical continuities [PDF]

open access: yesFilomat, 2015
A real valued function f defined on a subset E of R, the set of real numbers, is statistically upward (resp. downward) continuous if it preserves statistically upward (resp. downward) half quasi-Cauchy sequences; A subset E of R, is statistically upward (resp. downward) compact if any sequence of points in E has a statistically upward (resp.
openaire   +2 more sources

The stability criterion for downward continuation of surface gravity data with various spatial resolutions over Ireland [PDF]

open access: yes, 2021
The differences between local and reference geopotential values are the fundamental quantities of interest in the geodetic boundary value problem approach for connecting independent height reference frames.
Hagedoorn, Jan M. (Dr.)   +5 more
core   +1 more source

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