Results 31 to 40 of about 574,019 (245)

Estimation of gravity noise variance and signal covariance parameters in least squares collocation with considering data resolution

open access: yesAnnals of Geophysics, 2016
The article describes an implementation of the negative log-likelihood function in the determination of uncorrelated noise standard deviation together with the parameters of spherical signal covariance model in least squares collocation (LSC) of gravity ...
Wojciech Jarmołowski
doaj   +1 more source

Sequential Generation of Multi-GNSS Multi-Frequency PPP-RTK Products and Their Performance Using the EUREF Permanent GNSS Network

open access: yesRemote Sensing, 2023
In the classic Precise Point Positioning (PPP) approach, observations of Global Navigation Satellite Systems (GNSS) are processed at the network level to generate satellite clocks and positions.
Hans Daniel Platz
doaj   +1 more source

Isostasy – Geodesy

open access: yes, 2015
Isostasy (Greek isos “equal,” stasis “stand still”) is a term in geology, geophysics, and geodesy to describe the state of mass balance (equilibrium) between the Earth’s crust and upper mantle.
Mohammad Bagherbandi   +3 more
core   +1 more source

Optimizing Strategies for Non‐Invasive Prospection of Settlements in the Intertidal Zone: A Case Study From the Centre of the Drowned Medieval Village of Tolsende (Scheldt Estuary, the Netherlands)

open access: yesArchaeological Prospection, EarlyView.
ABSTRACT Medieval and early modern drowned villages in the intertidal zone of the Scheldt estuary (the Netherlands) constitute intriguing yet largely understudied components of north‐western Europe's underwater cultural heritage. Despite their high archaeological potential as time capsules of past settlement landscapes, research has remained limited ...
Jan Trachet   +9 more
wiley   +1 more source

Recent developments in seismological geodesy

open access: yesGeodesy and Geodynamics, 2016
With the advanced development of the modern geodetic techniques, the geodetic observations have been proved to be more powerful to uncover the geophysical phenomena, especially the seismic one, than that in the past time.
Caijun Xu, Zheng Gong, Jieming Niu
doaj   +1 more source

The three Swedish kings of geodesy – Speech at the NKG General Assembly dinner in 2022

open access: yesJournal of Geodetic Science, 2023
During the 1950s–1970s, there were three geodesy professors in Sweden. Before and after that period the only such position was at KTH in Stockholm. One in the triple proposed the creation of the Nordic Geodetic Commission, which was realized in 1953 and ...
Sjöberg Lars E.
doaj   +1 more source

Validating Precise Orbit Determination from Satellite-Borne GPS Data of Haiyang-2D

open access: yesRemote Sensing, 2022
Haiyang-2D (HY-2D) is the fourth satellite in the marine dynamic satellite series established by China. It was successfully launched on 19 May 2021, marking the era of the 3-satellite network in the marine dynamic environment satellite series of China ...
Jinyun Guo   +6 more
doaj   +1 more source

The Mechanism of Visible‐Light Photochemical Rearrangements of Conjugated Amide Enolates

open access: yesChemistry – A European Journal, EarlyView.
Visible light irradiation of extended enolates of N‐benzylamides leads to homolytic C─N Bond cleavage, generating a biradical. Computational and mechanistic studies suggest rapid radical recombination within a solvent cage to give either ring‐expanded or rearranged products. ABSTRACT Deprotonation of conjugated amides forms colored solutions of lithium
James Mortimer   +3 more
wiley   +1 more source

Numerical solutions for lunar orbits [PDF]

open access: yes, 1997
Starting from a variational formulation based on Hamilton’s Principle, the paper exploits the finite element technique in the time domain in order to solve orbital dynamic problems characterised by constrained boundary value rather than initial value ...
Vasile, Massimiliano, Finzi, Amalia E.
core   +3 more sources

Performance Analysis of the First Korean Satellite Laser Ranging System [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2014
The first Korean satellite laser ranging (SLR) system, Daedeok SLR station (DAEK station) was developed by Korea Astronomy and Space Science Institute (KASI) in 2012, whose main objectives are space geodesy researches.
Man-Soo Choi   +18 more
doaj   +1 more source

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