منابع مشابه
Scheduling Tools for Astronomical Observations
A key challenge for the new generation of 8m class facilities will be ensuring that the best observing conditions are fully exploited to carry out unique science | science that can only be accomplished when these conditions obtain. Flexible scheduling is one approach to this problem: by scheduling a mix of observations from a pool of available observing programs, it is possible to select best m...
متن کاملLaser frequency combs for astronomical observations.
A direct measurement of the universe's expansion history could be made by observing in real time the evolution of the cosmological redshift of distant objects. However, this would require measurements of Doppler velocity drifts of approximately 1 centimeter per second per year, and astronomical spectrographs have not yet been calibrated to this tolerance. We demonstrated the first use of a lase...
متن کاملSpeckle Imaging: a Boon for Astronomical Observations
The speckle imaging is a photographic technique that resolves objects viewed through severely distorted media. The results are insensitive to the errors caused by apparent size of the isoplanatic patch and the telescope aberrations. In this article, a short descriptions of the atmospheric turbulence and its effect on the flat wavefront from a stellar source is presented; the shortcomings of the...
متن کاملDetection and Blanking of Gsm Interference in Radio-astronomical Observations
Radio-astronomical observations are increasingly disturbed by man-made communication signals, satellite and broadcast services. In particular, the GSM band is a highly saturated domain, full with interferers which are much stronger than radio astronomical signals. In this paper we propose a strategy to reduce this interference using its non-stationary nature. We describe a multichannel interfer...
متن کاملA Survey on the Dynamic Scheduling Problem in Astronomical Observations
The tasks execution scheduling is a common problem in computer science. The typical problem, as in industrial or computer processing applications, has some restrictions that are inapplicable for certain cases. For example, all available tasks have to be executed at some point, and ambient factors do not affect the execution order. In the astronomical observations field, projects are scheduled a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Publications of the Astronomical Society of the Pacific
سال: 1902
ISSN: 0004-6280,1538-3873
DOI: 10.1086/121464