Results 31 to 40 of about 168,834 (300)

Ensuring Survivability of Spacecraft Attitude Control System at Failures in Flywheel Cluster

open access: yesHavacılık ve Uzay Teknolojileri Dergisi, 2021
A method for ensuring the survivability of a spacecraft attitude control system with minimally redundant cluster of the flywheels and magnetic actuator at the faults of any reaction wheels are presented.
Sergey Somov, Tatyana Somova
doaj  

Infrared Astronomical Satellite (IRAS) Scientific Data Analysis System [PDF]

open access: yes, 1980
The Jet Propulsion Laboratory's Scientific Data Analysis System will process Infrared Astronomical Satellite data and produce a catalog of perhaps a million infrared sources in the sky, as well as other vital information for astronomical ...
Duxbury, John H., Soifer, B. T.
core   +1 more source

SDSS J134441.83+204408.3: A Highly Asynchronous Short-period Magnetic Cataclysmic Variable with a 56 MG Field Strength

open access: yesThe Astrophysical Journal Letters, 2023
When the accreting white dwarf in a magnetic cataclysmic variable star (mCV) has a field strength in excess of 10 MG, it is expected to synchronize its rotational frequency to the binary orbit frequency, particularly at small binary separations, due to ...
Colin Littlefield   +8 more
doaj   +1 more source

The BGS magnetic field candidate models for the 12th generation IGRF [PDF]

open access: yes, 2015
We describe the candidate models submitted by the British Geological Survey for the 12th generation International Geomagnetic Reference Field. These models are extracted from a spherical harmonic ‘parent model’ derived from vector and scalar magnetic ...
Beggan, Ciaran D.   +3 more
core   +1 more source

Simulation of the Magnetic Signature for Ferromagnetic Objects in Motion Using 3D-Printing Data

open access: yesIEEE Access, 2019
Investigations of the magnetic signature for ferromagnetic objects are extremely important in many areas. Some famous software can calculate the magnetic signature generated by the 3D ferromagnetic objects in motion, but they require tremendous ...
Yangyi Sui   +3 more
doaj   +1 more source

A Synergic Strategy to Characterize the Habitability Conditions of Exoplanets Hosted by Solar-Type Stars

open access: yesFrontiers in Astronomy and Space Sciences, 2022
We present a new synergic strategy that merges the potential of asteroseismology with solar space weather/climate techniques in order to characterize solar-like stars and their interaction with hosted exoplanets. The method is based on the use of seismic
Raffaele Reda   +8 more
doaj   +1 more source

Interstellar Polarization Survey. III. Relation between Optical Polarization and Reddening in the General Interstellar Medium

open access: yesThe Astronomical Journal, 2023
Optical starlight can be partially polarized while propagating through the dusty, magnetized interstellar medium (ISM). The polarization efficiency describes the polarization intensity fraction per reddening unit, P _V / E ( B − V ), related to the ...
Y. Angarita   +6 more
doaj   +1 more source

Damage and restoration of historical urban walls: literature review and case of studies

open access: yesFracture and Structural Integrity, 2023
Within this work, the causes of collapses and damages occurred in masonry artefacts have been evaluated to properly identify suitable monitoring and restoration methods. In this regard, a comprehensive literature review has been performed.
Mauro Sassu, Aida Safabakhsh
doaj   +1 more source

Lithospheric long-wavelength magnetic anomalies and their geological origins: A review

open access: yes地球与行星物理论评
At the altitude of low-Earth-orbiting satellites, most details of lithospheric magnetic anomalies observed near surface are attenuated, and only slowly decaying long-wavelength magnetic anomalies can be detected.
Jie Wang   +6 more
doaj   +1 more source

The BGS candidate models for IGRF-13 with a retrospective analysis of IGRF-12 secular variation forecasts

open access: yesEarth, Planets and Space, 2021
The three candidate models submitted by the British Geological Survey for the 13th generation International Geomagnetic Reference Field are described.
William J. Brown   +3 more
doaj   +1 more source

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