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1561. Unified Survey of Fourier Synthesis Methodologies
... P. Mar?chal, E. Anterrieu, and A. Lannes . ... Full attention is devoted to the Fourier synthesis operation, which proves to be the central issue with regard to the global problem. ... Recently, a new Fourier synthesis method has been developed for radio imaging and optical interferometry (Lannes, Anterrieu, & Bouyoucef 1994, 1996; Lannes, Anterrieu, & Mar?chal 1997): WIPE|. ... We now turn to the unification of WIPE| with the methodologies mentioned in ? ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/marechalp.html -- 15.3 Кб -- 23.06.1998
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1562. The SAOtng Programming Interface
... Easy to use C, FORTRAN, and UNIX interfaces provide direct access to SAOtng information, data, and control functions. ... XPA allows an Xt program such as SAOtng to define named ``public access points'' through which data and commands can be exchanged with other programs. ... New image files can be loaded using the file public access point: csh) imset file ../data/coma.fits Sending an image file name to the file access point causes SAOtng to load and display that image. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/mandele.html -- 13.2 Кб -- 23.06.1998
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1563. Integrating the HST Guide Star Catalog into the NASA/IPAC Extragalactic
... We report initial results of cross-identification of extragalactic objects from the NASA/IPAC database and Guide Star Catalog (GSC). ... The NASA/IPAC Extragalactic Database (NED) contains positions, extensive data, and 1,023,000 cross-identifications for over 592,000 extragalactic objects (galaxies, quasars, and radio sources). ... Catalogs and lists are being integrated into NED on a continuing basis, following a detailed cross-identification process. ... Final cross-identification results: . ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/malkovo.html -- 12.7 Кб -- 23.06.1998
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1564. The ESO VLT CCD Detectors Software
... Charge Coupled Devices (CCD) are currently by far the most widely used type of detector in astronomy. ... After a brief introduction to the VLT Control System, the VLT CCD Detectors Control Software is presented. The VLT Control System is a distributed system consisting of a set of UNIX Workstations, dedicated to high level operations, such as coordination of sub-system activities and interface to the users, and VME-based Local Control Units (LCU), dedicated to the control of sub-systems hardware. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/longinottia.html -- 10.1 Кб -- 23.06.1998
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1565. Synthetic Images of the Solar Corona from Octree Representation of 3-D Electron
... Empirical and theoretical modeling of 3-D structures in the solar corona is confronted by the tremendous amount of data needed to represent phenomena with a large dynamic range both in size and magnitude, and with a rapid temporal evolution. Octree representation of the 3-D coronal electron distribution offers the right compromise between resolution and size, allowing computation of synthetic images of the solar corona. ... The time interval between images is one day. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/llebariaa2.html -- 12.0 Кб -- 23.06.1998
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1566. In-Orbit Calibration of the Distortion of the SOHO/LASCO-C2 Coronagraph
... This paper describes distortion calibration procedures for the SOHO /LASCO-C2 Coronagraph, based on in-orbit data and extensive image processing methods. ... C2 suffers from moderate optical distortion, which must be corrected in order to properly locate the stars crossing its field-of-view (which are subsequently used for photometric calibrations), to retrieve critical attitude parameters, and to insure a correct overlapping of the region common to the C2 and C3 instruments. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/llebariaa1.html -- 13.1 Кб -- 23.06.1998
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1567. A Home-Grown But Widely-Distributed Data Analysis System
... I stopped doing research during the five years 1986-1990, and crafted a series of programs for doing spectral line and image analysis on DOS-based IBM PCs. ... Between 1986 and 1991, I all but abandoned my research career and coded a series of programs which deal with spectral line and image analysis. ... And the vast majority of any market for my offline data analysis programs were to be the very souls whom I would forever have disenfranchised by asking each of them to roll their very own. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/liszth.html -- 26.6 Кб -- 23.06.1998
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1568. Towards Optimal Analysis of HST Crowded Stellar Fields
... The improvement will be more pronounced in our crowded Wide Field Camera (WFC) images, and may be increased further through use of a more sophisticated method of combining the individual dithered images. Our analysis allows us to check for point spread function shape variations in the HST Planetary Camera (PC) field. ... In crowded field images, we are deriving information about the faint end of the luminosity function (LF) from the texture of the image background. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/lindepe.html -- 10.0 Кб -- 23.06.1998
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1569. Data Processing for the Siberian Solar Radio Telescope
... The SSRT is a cross-shaped interferometer. The way of forming its response is rather specific, so various programs to process its data were required. ... A set of IDL programs was developed which allows us to look through the records and view data in various representations; to measure a radio source size, flux, and its location on the Sun; to build high-sensitivity 1-D images, etc. The Siberian Solar Radio Telescope (SSRT) (Smolkov et al. 1986) is a large astronomical instrument. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/konovalovs2.html -- 11.9 Кб -- 23.06.1998
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1570. IDL Library Developed in the Institute of Solar-Terrestrial Physics (Irkutsk,
... Institute of Solar-Terrestrial Physics, Lermontov St. 126, Irkutsk, Russia 664033, E-mail: root@sitmis.irkutsk.su . ... Special requirements, convenience, and efficiency led us to the creation of an expanding library of IDL routines and programs, described herein. ... In response to inherently specific features of our instrument, the SSRT, and to our research needs and preferences, we have developed, supplemented, and corrected some routines from the standard IDL library. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/konovalovs1.html -- 12.9 Кб -- 23.06.1998
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1571. Refined Simplex Method for Data Fitting
... Optical Science Laboratory, Department of Physics and Astronomy, University College London, London, WC1E 6BT, U.K. The simplex method, a data fitting method to any type of function, is refined by eliminating a redundant process. The refined method is applied to Zernike polynomials in Cartesian coordinates, which describe an optical surface or wavefront in terms of aberrations. ... Data fitting to Zernike polynomials has mainly been done by the least-squares method (Malacara et al. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/kimys.html -- 11.0 Кб -- 23.06.1998
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1572. Generalized Spherical Harmonics for All-Sky Polarization Studies
... Consequently, it is inappropriate to expand and in ordinary spherical harmonics. The proper expansion expresses both and simultaneously in terms of a particular order of generalized spherical harmonics. ... Generalized spherical harmonics start at , and for each , . ... Generalized spherical harmonics obey a sum rule analogous to a familiar one for ordinary spherical harmonics, but it includes an explicit phase factor which depends on the orientation of the two lines of sight. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/keegstrap.html -- 13.2 Кб -- 23.06.1998
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1573. The AXAF Ground Aspect Determination System Pipeline
... This article describes the AXAF aspect determination pipeline and its components, and highlights a procedure for determining centroids-a crucial step in deriving the post-facto aspect solution. ... The Ground Aspect Determination System (GADS) pipeline is a collection of tools which process aspect telemetry and generate aspect data products. ... Using a subset of ACA pixel data from the Aspect Interval, we identify poorly-fitting PSFs and find spoiler stars in star and fiducial light images. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/karovska1.html -- 11.1 Кб -- 23.06.1998
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1574. Remote Eavesdropping at the JCMT via the World Wide Web
... Previous: The JCMT Telescope Management System . ... In order to allow astronomers to monitor their data from their home institutions, JCMT has adopted the WWW Observing Remotely Facility (WORF) already offered by the United Kingdom Infrared Telescope (UKIRT). ... We are anticipating the community's requirement for a way to monitor remotely their observations by developing the World Wide Web Observing Remotely Facility (WORF). ... A demo of the data preview component of WORF2 is also available. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/jennesst.html -- 11.1 Кб -- 23.06.1998
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1575. Instrument-Specific Software
... Calibration and Performance Control for the VLT Instrumentation . ... The ESO VLT CCD Detectors Software . ... The Observatory Monitoring System: Analysis of Spacecraft Jitter . ... O. M. Smirnov and O. Yu. Malkov . ... NICMOS Calibration Pipeline: Processing Associations of Exposures . ... NICMOS Related Software Development at the ST-ECF . ... The Data Handling System for the NOAO Mosaic . ... IRAF Data Reduction Software for the NOAO Mosaic . ... Data Format for the NOAO Mosaic . ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/instrument-specific.html -- 4.0 Кб -- 23.06.1998
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1576. The Observatory Monitoring System: Analysis of Spacecraft Jitter
... The Observatory Monitoring System (OMS) is part of the Hubble Space Telescope (HST) ground system at the Space Telescope Science Institute. OMS receives as inputs a file of commands for the HST and files of engineering telemetry data generated by the HST in response to those commands. This paper will discuss how, from its inputs, OMS software provides spacecraft jitter files during observations commanded in the input. ... The jitter image file will be archived for the user. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/hydep.html -- 12.1 Кб -- 23.06.1998
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1577. A Configuration Control and Software Management System for Distributed
... A system to efficiently control and manage the software development of a large project is presented. The overall design, implementation and use of the configuration control system ( CoCo ) and the calibration database ( CalDB ) used for off-line software development of the Short Wavelength Spectrometer (SWS) in the Infrared Space Observatory ( ISO ) is described. ... The CoCo system is capable of efficiently controlling the development of the IA 3 software. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/huygene.html -- 12.6 Кб -- 23.06.1998
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1578. Variable-Pixel Linear Combination
... The algorithm, known as Variable-Pixel Linear Reconstruction (or informally as ``drizzling"), preserves photometry and resolution, can weight input images according to the statistical significance of each pixel, and removes the effects of geometric distortion both on image shape and photometry. ... Drizzling'' maps pixels in the original input images onto the pixel grid of a subsampled output image, taking into account shifts and rotations between images and the optical distortion of the camera. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/hookr.html -- 13.0 Кб -- 23.06.1998
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1579. The DRAO Export Software Package
... Over the years, the computing staff at the Dominion Radio Astrophysical Observatory (DRAO) have developed an extensive package of software for the analysis of radio-astronomical data. ... The DRAO export software package came into being not by deliberate plan, but as a result of users' needs-precipitated by the funding of the Galactic Plane Survey project. ... The madr program (``manipulation and data review'') is a general-purpose program for quick-look analysis of data and simple data presentation...
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Ссылки http://www.adass.org/adass/proceedings/adass96/higgsl.html -- 12.6 Кб -- 23.06.1998
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1580. Implementation Design of the ASC Data Model
... To accomplish this, the data model will use a layered design. ... Figure: Layered Design of the ASC Data Model. ... The decision to adopt the ETOOLS package as the generic layer of the implementation of the ASC data model was made because it meets the implementation requirements. ... Standard API Independent of Data Format : Because of the ETOOLS kernel approach, tools and applications designed and implemented on top of the ETOOLS package can access different disk file formats through the same API. ...
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Ссылки http://www.adass.org/adass/proceedings/adass96/herreroj.html -- 12.3 Кб -- 23.06.1998
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