Results 21 to 30 of about 18,055 (209)

Stone observatory at Bric Pinarella (Finale Ligure, Italy) [PDF]

open access: yesArchaeoastronomy and Ancient Technologies, 2017
This paper reports the latest findings on the stone observatory of Bric Pinarella (Finale Ligure, Savona, northern Italy), first described in 2006 at the conference of the Italian Society of Archaeoastronomy (SIA).
Codebo, M., De Santis, H., Pesce, G.L.
doaj   +1 more source

Mass data capture (mdc) techniques and the main section in buildings with large deformations

open access: yesEGA, 2021
The survey of buildings is essential for the development of the graphic representation of architecture. Its principles were outlined in the Carta del rilievo architettonico of Naples (1999), where this survey is established as an element of iconographic,
Josep Lluis i Ginovart   +2 more
doaj   +1 more source

Development of a 0.25 m f/10 reflecting telescope consisting of a thin primary mirror and a friction drive

open access: yesRuhuna Journal of Science, 2020
Modern astronomical telescopes are comprised of high-quality optics and superior mounting designs to meet the standards and challenges of observational astronomy. Cost of commercial telescopes is a constraint for developing countries like Sri Lanka to
H.S.D. Amaradasa   +4 more
doaj   +1 more source

New discoveries on astronomical orientation of Inca site in Ollantaytambo, Peru

open access: yesGeoinformatics FCE CTU, 2015
This paper deals with astronomical orientation of Incas objects in Ollantaytambo, which is located about 35 km southeast from Machu Picchu, about 40 km northwest from Cusco, and lies in the Urubamba valley.
Karolína Hanzalová   +2 more
doaj   +1 more source

Polarization Orientation Method Based on Remote Sensing Image in Cloudy Weather

open access: yesRemote Sensing, 2023
Autonomous navigation technology is a core technology for intelligent operation, allowing the vehicles to perform tasks without relying on external information, which effectively improves the concealability and reliability.
Jiasai Luo   +7 more
doaj   +1 more source

A Precise Algorithm for Computing Sun Position on a Satellite [PDF]

open access: yesJournal of Aerospace Technology and Management, 2019
To meet the high precision sun tracking needs of space deployable membrane solar concentrator and other equipment, an existing algorithm for accurately computing the sun position is improved.
Tao Zheng, Fei Zheng, Xi Rui, Xiang Ji
doaj   +2 more sources

The astronomical orientation of the urban plan of Alexandria [PDF]

open access: yes, 2011
Alexander the Great founded Alexandria in 331 BC. The newly founded town was conceived as an orthogonal grid based on a main longitudinal axis, later called Canopic Road.
Ferro, Luisa, Magli, Giulio
core   +3 more sources

THE ROLE OF ASTRO-GEODETIC IN PRECISE GUIDANCE OF LONG TUNNELS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
One of prime aspects of surveying projects is guidance of paths of a long tunnel from different directions and finally ending all paths in a specific place. This kind of underground surveying, because of particular condition, has some different points in
M. Mirghasempour, A. Y. Jafari
doaj   +1 more source

Servo control system design for square kilometre array radio telescope [PDF]

open access: yesJournal of Hebei University of Science and Technology
To construct the world’s largest aperture radio telescope and equip the system with the highest sensitivity and image resolution, a new control system was developed for the 15-meter offset SKA antenna.
Qiang ZHANG, Yifan ZHANG, Xuguang GENG
doaj   +1 more source

Research on magnetic declination in Lithuanian territory

open access: yesAviation, 2008
Magnetic declination is the angle between the planes of the astronomic and magnetic meridians. Magnetic declination is used in navigation, geophysics, geodesy, cartography, geology, and other fields.
Romuald Obuchovski   +2 more
doaj   +1 more source

Home - About - Disclaimer - Privacy