Results 191 to 200 of about 200,926 (234)
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Rapid methods for determining astronomical azimuths
Eos, Transactions American Geophysical Union, 1944Astronomical computations for position or azimuth are not difficult for the astronomer or mathematician, even though such computations may be time‐consuming. In the past few years, however, there has been a general trend toward the simplification of problems involving astronomy.
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METHOD FOR EVENING ASTRONOMIC OBSERVATIONS
Galaxy International Interdisciplinary Research Journal, 2022This article describes the method of organizing astronomy laboratories and observations in general secondary schools. At the same time, we discussed how practical observations can be made in astronomy, and their types.
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Geometric method to measure astigmatism aberration at astronomical telescopes
Applied Optics, 2007A simple geometrical method to measure the aberration of astigmatism present in the wavefront that emerges from a telescope is presented. The method is based on the analysis of the external contour of the image of a slightly defocused star. An expression elliptical edge is obtained, which links the rms value of Z22 to the geometric parameters of the ...
Esteban, Luna +3 more
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A Subpixel Deconvolution Method for Astronomical Images
1991We present results from the use of an image deconvolution method for achieving subpixel resolution in certain data regimes. Restorations are performed using a shell which utilizes the Gull-Skilling MEMSYS-3 package. We have performed extensive tests using the method and have determined general limits of its applicability and resolving power. We present
Weir, N., Djorgovski, S.
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Multiplexed astronomical images: advantages, method, and prototype instrument
SPIE Proceedings, 2014In some optical systems in which a large field of view (and hence a large detector) is required, it is the detector which drives the total system cost. We propose a concept, and demonstrate an optical system, for an astronomical multiplexer. The instrument projects different portions of the telescope focal plane into a single (possibly) small detector ...
Sagi Ben-Ami +5 more
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Rate of Change Methods in Astronomical Surveying
Journal of the Surveying and Mapping Division, 1980A method is described whereby longitude, latitude and azimuth can be obtained by taking sights on the sun at short timed intervals. Both rate of change of altitude with time and rate of change of bearing with altitude can be used to calculate the observer’s position and the direction of the meridian.
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On the astronomical method of tracking satellites
Chinese Astronomy, 1980Abstract In this paper we use the theory of multivariate error analysis to find the expression for the covariance matrix of satellite positions attained by the astronomical method. The dependence of the positional accuracy of the target to the reference stars and on its position within an interpolated segment is discussed and explicit formulae are ...
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Astronomical methods and calculations
The Physics Teacher, 1987Agnes Acker +2 more
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Astronomical radio interferometry
Nature Reviews Methods Primers, 2023Yoshiharu Asaki +2 more
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The Estimation of Plate Motions by Astronomical Methods
Canadian Journal of Earth Sciences, 1972Some of the problems involved in the detection of plate motions by astronomical methods are discussed with particular reference to a Herstmonceux–Calgary cooperative program using photographic zenith tubes. Analysis of the observations obtained in 1969 and 1970 shows that several decades of continued observation may suffice with present techniques to ...
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