Scientists and engineers who work with the Far Ultraviolet Spectroscopic Explorer have pulled off a second daring and unprecedented rescue of the satellite observatory from serious guidance problems. This time, though, they didn´t actually wait for the guidance problems to happen.
In response to hints of the potential for future new difficulties with FUSE´s gyroscopes, which are used to check the satellite´s pointing accuracy, researchers redesigned software for three computers aboard FUSE and recently uploaded the new software to the computers.
The staff of FUSE, operated for NASA by Johns Hopkins University, compared the feat to a "brain transplant." They currently maintain detailed control of FUSE´s precise orientation through the gyros´ ability to sense even very small shifts in the satellite´s position. If too many of the gyros stop working, however, the new software will allow controllers to switch over to using the fine error sensor, a camera aboard FUSE, in their place. In the new guidance mode, detailed information on where FUSE is pointing will be determined via the positions of key stars imaged in the fine error sensor.
Michael Purdy | EurekAlert!
Applicability of dynamic facilitation theory to binary hard disk systems
08.12.2016 | Nagoya Institute of Technology
Will Earth still exist 5 billion years from now?
08.12.2016 | KU Leuven
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
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