Results 51 to 60 of about 4,004,586 (295)

Linking community structure and climate vulnerability in desert plant assemblages of southern California

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Desert plant assemblages in southern California provide an opportunity to link patterns of community structure with climate‐driven vulnerability in a rapidly changing environment. California sustains an exceptionally diverse flora of approximately 4300 plant species, with 31% identified as endemic.
Hector Zumbado‐Ulate   +4 more
wiley   +1 more source

Photon Phase Delay Sensing with Sub-Attosecond Uncertainty

open access: yesSensors
The application of statistical estimation theory to Hong–Ou–Mandel interferometry led to enticing results in terms of the detection limit for photon reciprocal delay and polarisation measurement.
Fabrizio Sgobba   +2 more
doaj   +1 more source

Testing impact of the strategy of VLBI data analysis on the estimation of Earth Orientation Parameters and station coordinates

open access: yesReports on Geodesy and Geoinformatics, 2016
Very Long Baseline Interferometry (VLBI) is the only space geodetic technique capable to realise the Celestial Reference Frame and tie it with the Terrestrial Reference Frame.
Wielgosz Agata   +2 more
doaj   +1 more source

ICESat‐2 Constraint Analysis and Monitoring System (CAMS)

open access: yesEarth and Space Science, 2021
The Ice, Cloud and land Elevation Satellite‐2 was launched on 15 September 2018 with mission goals of collecting surface elevation data that can precisely measure ice sheet topography, cloud and aerosol heights, land topography, as well as vegetation ...
T. W. Rebold   +5 more
doaj   +1 more source

Together Again for Geodesy

open access: yes
This open access volume contains 46 selected papers from the symposia organised or co-organised by the International Association of Geodesy (IAG) in the framework of the 28th General Assembly of the International Union of Geodesy and Geophysics (IUGG ...

core   +2 more sources

X Hotine-Marussi Symposium on Mathematical Geodesy [PDF]

open access: yes
This open access volume contains the proceedings of the X Hotine-Marussi Symposium on Mathematical Geodesy which was held from 13 to 17 June 2022 at the Politecnico di Milano, Milan, Italy.

core   +1 more source

Advanced Mathematical Extensions of Data Field Theory: Hyperbolic Geometry, Gauge Theory, and Higher Structures

open access: yesAdvanced Physics Research, EarlyView.
This graphical abstract illustrates the unified framework of Data Field Theory (DFT), integrating hyperbolic geometry for hierarchical embedding, gauge theory for internal symmetries, renormalization group for multi‐scale dynamics, Lévy processes for heavy‐tailed fluctuations, noncommutative geometry for quantum‐inspired cognition, and higher ...
Mohammadreza Nehzati
wiley   +1 more source

Current Situation of GNSS Networks in Romania

open access: yesBulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca: Horticulture, 2019
Nowadays, the need for a more precise positioning is a very high, therefore very demanding one, and this is one of the reasons why very large research funding is allocated in satellite technology, the second reason being global geopolitics situation. New
Alexandru Iulian ILIESCU   +4 more
doaj   +1 more source

RF Environment Test on a Proposed Site for the Sensor Station of the Next Generation Satellite Navigation System, GALILEO: II. The Result of the Test on the Candidate Site in the Year of 2007 by KASI and ESA [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2008
A RF environmental field test for the proposed Galileo Sensor Station site was done by Alcatel Alenia technical team contracted by European Space Agency (ESA) and the Space Geodesy division of Korea Astronomy and Space Science Institute at the Korean ...
Jung Hyun Jo   +7 more
doaj   +1 more source

DEEP STRUCTURE OF THE ALTAI MOUNTAINS AND MODERN GRAVITY FIELD MODELS

open access: yesГеодинамика и тектонофизика, 2023
The results of the ground-based absolute gravity and space geodetic measurements for the Altai Mountains were considered in combination with EIGEN-6C4 Global Geopotential Model (ETOPO1 Global Relief Model) generated from the satellite data.
V. Yu. Timofeev   +7 more
doaj   +1 more source

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