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941. Evolution of EUVE Guest Observer Data Reduction
... Next: The OPUS Pipeline: Up: Software Systems Previous: The ASC Pipeline: . ... The Extreme Ultraviolet Explorer ( EUVE ) Guest Observer (GO) Center is in its second year of data processing. ... The Extreme Ultraviolet Explorer ( EUVE ) Guest Observer (GO) Center is now in its second year of data processing. ... From its inception the GO Center expected to disseminate very complete raw data sets to GOs, calibration and reduction software, as well as the calibrated data products. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/olsone.html -- 15.5 Кб -- 03.11.2000
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942. Source-searching in Photon-event Lists without Imaging
... One of these works directly on an event list, avoiding the losses which occur when events are binned into images. ... A much better solution would be to avoid forming images at all and apply maximum likelihood to the raw event list. ... Rapid access to the event data was also essential. ... Simulating a suitably realistic sky with added sources takes long enough in the image domain, the generation of a sufficiently large set of photon-event lists with similar properties would have taken even longer....
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Ссылки http://www.adass.org/adass/proceedings/adass94/pagec.html -- 15.0 Кб -- 03.11.2000
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943. A Generalized Mosaic-to-SQL Interface with Extensions to Distributed Archives
... The system is general, due to some simple naming conventions for database tables. ... Furthermore, the interface allows X-Y plotting of any two numerical quantities retrieved from the database, and access to data archives distributed over Internet, following the WWW concept. ... The user interface allows access to the underlying structure of the archive: a catalogue managed by a commercial SQL-based database management system, and a data bank holding the original data and compressed quick-look data....
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Ссылки http://www.adass.org/adass/proceedings/adass94/pasianf.html -- 14.1 Кб -- 03.11.2000
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944. Spatial Models and Spatial Statistics for Astronomical Data
... Here T is the index set, is the spatial process, is a realization of the process. ... A usual spatial point process is defined as (i.e., the index set is the points of ) or [the number of points within A ]; (i.e., the index set is the units of ), where both and T are random. ... The most important application of lattice models is statistical modeling of spatial images, which is widespread in astronomical image processing (restoration, segmentation, classification, reconstruction, etc.) ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/pasztorl1.html -- 16.3 Кб -- 03.11.2000
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945. Spatial Structure of NGC 6822: An Example for Statistical Modeling of
... Next: Cheating Poisson: A Up: Statistical Analysis Previous: Spatial Models and . ... The spatial distribution of stars in the Local Group dwarf irregular galaxy NGC 6822 has been studied, using recent positions and deep photometry for about 15,000 stars in the galaxy. Based on photometrical data, OB stars and red stars could be studied separately. Spatial statistical tools have been applied to the analysis of the spatial structure. ... Figure: Model selection by the aid of CAIC . ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/pasztorl2.html -- 11.0 Кб -- 03.11.2000
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946. Electronic Submission of HST Phase I Observing Proposals
... The process of proposing for Hubble Space Telescope observing time has been revised, to make it simpler for proposers. We describe the simple, flexible, and robust prototype system created to handle proposal submission. ... Proposing for Hubble Space Telescope ( HST ) observing time proceeds in two phases: the scientific merits of the proposal are considered in Phase I; only accepted proposals enter Phase II, where the observations are described in complete detail. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/payneh.html -- 10.3 Кб -- 03.11.2000
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947. FITSIO Subroutine Library Update
... Next: FITS Checksum Verification Up: Data Models and Previous: A Proposed Convention . ... The FITSIO Subroutine Library has been available for 3 years, and has matured into a stable, full-featured interface for reading and writing FITS format files. ... The FITSIO subroutine library for reading and writing FITS files is now three years old and is used by many projects as the standard programming interface for accessing FITS format data files. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/pencew.html -- 8.3 Кб -- 03.11.2000
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948. A Generic Data Exchange Scheme Between FITS Format and C Structures
... A flexible and efficient scheme allowing arbitrary FITS Binary and ASCII Tables to be converted to arbitrary C structures at run-time is presented. ... We have developed a versatile scheme that allows data transfer between FITS Tables and C data structures. This generic scheme uses two supporting structures: a TBLCOL to contain an arbitrary FITS Binary or ASCII Table (or both), and a translation table that maps TBLCOL to a user-specified C structure. ... Figure: TBLCOL Format Components. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/pengw.html -- 12.5 Кб -- 03.11.2000
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949. A Graphical Front End for the WIYN Telescope Engineering Data System
... Next: Space and the Up: GUIs and Visualization Previous: A Graphical Planning . ... The WIYN 3.5m Telescope Control System features a platform independent, network transparent protocol for distributing telescope control data to both local and remote sites. ... The WIYN Engineering Data Subsystem (EDS) is a spacecraft-style telemetry system that sends telescope telemetry (encoders, currents, voltages, pointing data, etc.) in a machine-independent format to clients connected across a network. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/percivalj.html -- 11.0 Кб -- 03.11.2000
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950. Organizing Observational Data at the Telescope
... The MIDAS Data Organizer, a customizable utility to analyze and identify associations in a database of astronomical observations, is described. ... On-line Data Reduction: . ... The main characteristics of the on-line implementation of the DO at the ESO New Technology Telescope (NTT) are described below. The database for all operations is a MIDAS (ESO-IPG 1993) table, the so-called Observation Summary Table (OST) which contains all relevant parameters extracted from the FITS keywords. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/peronm.html -- 11.9 Кб -- 03.11.2000
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951. Registering, PSF-Matching and Intensity-Matching Images in IRAF
... We have developed a set of tasks in the IRAF environment for registering, matching the point-spread functions, and matching the intensity scales of two or more images. ... The current software performs spatial registration by supplying the registration task with a reference and input image list, and a list of features common to both images. ... The current software requires the input and reference images to be spatially-registered and PSF-matched. ... CTIO 4-m images courtesy of Nelson Calwell.) ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/phillipsa.html -- 12.5 Кб -- 03.11.2000
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952. The Hubble Data Archive: Opening the Treasures of the HST to the Community
... Next: Designing an Open Up: Archives and Databases Previous: The Hubble Space . ... The data to be collected by the Hubble Space Telescope ( HST ) promised to be a significant new resource to the astronomy community, even before HST 's launch. ... DMF experimented with optical disk media, jukeboxes, database indexing of the data, and user interfaces. ... The Space Telescope Data Archive and Distribution Service (STDADS) was developed as the permanent archive by Loral Aerosys, under contract to NASA....
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Ссылки http://www.adass.org/adass/proceedings/adass94/pollizzij.html -- 14.9 Кб -- 03.11.2000
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953. WDB---A Web Interface to Sybase
... WDB is a software toolset that tremendously simplifies the integration of Sybase databases into the World Wide Web. ... WDB automatically creates HTML forms, on-the-fly , to allow users to query the database, and given these query constraints, it will query the database and present the result to the user. ... The forms and description of how the individual fields in the form links to fields in the database are defined using Form Definition Files ( fdf's ) located on the server. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/rasmussenb.html -- 11.8 Кб -- 03.11.2000
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954. A Method for Minimizing Background Offset Errors When Creating Mosaics
... When creating a mosaic from a set of individual frames, the correct background offset for each frame must be determined for proper matching. In this paper we describe a method for constructing a mosaic from a set of individual frames by applying a minimization technique. ... Typically these are frames with some known defect (see ? ... Determining which frames to exclude from the final mosaic is critical, since one bad frame can create background offset errors that propagate throughout the mosaic. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/reganm.html -- 12.3 Кб -- 03.11.2000
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955. Design of a Remote Proposal Submission System
... Next: Electronic Submission of Up: Network Information Systems Previous: An Information System . ... NASA/Goddard Space Flight Center, Laboratory for High Energy Astrophysics, Greenbelt MD 20771 . ... Several tools have been developed at the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA's Goddard Space Flight Center, including a Remote Proposal Submission (RPS) system for NASA satellite missions. ... It is an automated service, designed to support several missions. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/richmonda.html -- 10.5 Кб -- 03.11.2000
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956. Designing an Open E-Mail Interface to a Data Archive
... The retrieval method should be insulated from the user interface so that changes to one system do not force changes to the other. ... In 1993 the Hubble Data Archive group reviewed the original design of the Space Telescope Data Archive and Distribution System (STDADS) for retrieving data. The design called for any user interested in retrieving data to have an account on the operational archive system, and to use a command line syntax to retrieve data. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/richonj.html -- 12.1 Кб -- 03.11.2000
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957. The View From NASA Headquarters: Trends And Changes in Mission Operations And
... NASA Headquarters, Astrophysics Division, Washington DC . The Astrophysics Program at NASA is mission oriented. With seven flying missions and twenty additional (international collaborations) planned, NASA provides an ever increasing amount of exciting astrophysical data, and supports a large portion of astrophysics data analysis. ... The future contains many changes that offer us significant challenges. ... Other restructuring plans affect the data analysis plans for several flying missions. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/rieglerg.html -- 13.6 Кб -- 03.11.2000
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958. A Proposed Convention for Writing FITS Data Tapes: DRAFT 0
... Even with today's advances in networking, file system capacities and CD technology it is often necessary to transport and store scientific data sets on magnetic tape. The FITS data format standard contains guidelines on how to write FITS files to magnetic tape but does not address the problem of indexing or organizing tape files. ... 8--16 GB per 4mm tape). ... This paper presents a convention for writing self-describing magnetic tapes that contain FITS formatted data files. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/rosat.html -- 12.8 Кб -- 03.11.2000
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959. The OPUS Pipeline: A Partially Object-Oriented Pipeline System
... The Post Observation Data Processing System (PODPS) for Hubble Space Telescope Science Operations Ground System was designed under the expectation that problems and bottlenecks would be resolved over time by bigger, faster computers. ... Such a (partially) object-oriented system allows multiple processes to be distributed on multiple nodes over multiple paths. ... When an observation enters the system the first pipeline process creates an ``observation status file" in the blackboard directory. ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/rosej.html -- 15.8 Кб -- 03.11.2000
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960. A Retrospective View of Miriad
... Miriad is a radio interferometry data-reduction package, designed for taking raw data through to the image analysis stage. The Miriad project, begun in 1988, is now middle-aged. ... The first astronomically useful applications (FITS readers/writers, imaging and deconvolution tasks) appeared in 1988 October. ... The on-line system also writes the raw data directly in the Miriad uv data format (this requirement was one of the reasons why uv FITS was unsatisfactory). ...
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Ссылки http://www.adass.org/adass/proceedings/adass94/saultr.html -- 15.0 Кб -- 03.11.2000
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