Results 41 to 50 of about 261,794 (327)

Digital representation of historical globes : methods to make 3D and pseudo-3D models of sixteenth century Mercator globes [PDF]

open access: yes, 2012
In this paper, the construction of digital representations of a terrestrial and celestial globe will be discussed. Virtual digital (3D) models play an important role in recent research and publications on cultural heritage.
De Coene, Karen   +5 more
core   +2 more sources

A Unified Global Reference Frame of Vertical Crustal Movements by Satellite Laser Ranging

open access: yesSensors, 2016
Crustal movement is one of the main factors influencing the change of the Earth system, especially in its vertical direction, which affects people’s daily life through the frequent occurrence of earthquakes, geological disasters, and so on.
Xinhui Zhu   +3 more
doaj   +1 more source

Navigator Notes: Editorial Highlights from the Editor-in-Chief

open access: yesNavigation
Welcome to the Summer 2025 issue of NAVIGATION. As geopolitical events continue to be front and center these days, almost half of the articles in this issue deal with aspects of GNSS integrity.
Richard B. Langley
doaj   +1 more source

RANSAC approach for automated registration of terrestrial laser scans using linear features [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013
The registration process of terrestrial laser scans (TLS) targets the problem of how to combine several laser scans in order to attain better information about features than what could be obtained through single scan.
K. Al-Durgham, A. Habib, E. Kwak
doaj   +1 more source

Impact of terrestrial reference frame realizations on altimetry satellite orbit quality and global and regional sea level trends: a switch from ITRF2008 to ITRF2014

open access: yesSolid Earth, 2019
. A terrestrial reference frame (TRF) is a basis for precise orbit determination of Earth-orbiting satellites, since it defines positions and velocities of stations, the tracking data of which are used to derive satellite positions.
S. Rudenko   +3 more
semanticscholar   +1 more source

Video adaptation for mobile digital television [PDF]

open access: yes, 2010
Mobile digital television is one of the new services introduced recently by telecommunications operators in the market. Due to the possibilities of personalization and interaction provided, together with the increasing demand of this type of portable ...
Cuenca, Pedro   +6 more
core   +2 more sources

Sistemas Geodésicos de Referência: Rumo ao GGRS/GGRF

open access: yesRevista Brasileira de Cartografia, 2020
O estabelecimento de Sistemas Geodésicos de Referência globais integrando características geométricas e físicas é um dos desafios atuais da Geodésia, principalmente devido às demandas de diversas áreas do conhecimento de que as informações relacionadas ...
Regiane Dalazoana   +1 more
doaj   +1 more source

Nanothermometry in Living Cells: Physical Limits, Conceptual and Material Challenges

open access: yesAdvanced Functional Materials, EarlyView.
Heat and temperature are fundamental to life. When nanothermometers began probing regions as small as a living cell, they triggered controversial claims of large intracellular temperature gradients. We review physical constraints energy‐conservation, entropy production, thermodynamic fluctuations, and molecular dynamics.
Taras Plakhotnik
wiley   +1 more source

Comparison and Assessment of Three ITRS Realizations

open access: yesRemote Sensing, 2021
A terrestrial reference frame (TRF) is derived based on historical geodetic data and is normally updated every 5–6 years. The three most recent International Terrestrial Reference System (ITRS) realizations, ITRF2014, DTRF2014, and JTRF2014, were ...
Jiao Liu   +5 more
doaj   +1 more source

The GPS Laser Retroreflector Array Project [PDF]

open access: yes, 2012
Systematic co-location in space through the precision orbit determination of GPS satellites via satellite laser ranging will contribute significantly towards improving the accuracy and stability of the international terrestrial reference frame.
Merkowitz, Stephen M.
core   +1 more source

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