... A technique allowing automatic representation by a relatively small number of independent parameters based on the principal component analysis of data sequences is presented. ... In recent years the spectrum of observed astronomical data can be characterized as greatly varied. ... In this instance, the problem of initial description and classification of newly-observed data becomes most urgent, especially if there is a lack of preliminary observational material and theoretical expectations. ...

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• Synthetic Images of the Solar Corona from Octree Representation of 3-D Electron
• PICsIM - the INTEGRAL/IBIS/PICsIT Observation Simulation Tool for Prototype
• Refining the Guide Star Catalog: Plate Evaluations

A computer controlled low light photometer for nightglow observations. Hardware units of portable photometer for low light measurements, especially night glow emission is described. ... Interface card contain three channels of 24 bit counter, 4 channels of 12 bit ADC and the buffer bus for the controlled motors of the altazimuthal fork mounting and filters wheel, the position encoders. ... Where N( ) is output signal photometer generated input light flux F( l ) . ... PMT # . 599 . ...

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• Explanations to ephemeris for physical observation of the planets for Computer
• Lunar physical observations. Explanations for Computer Ephemeris.
• Central meridian positions for physical observations of Uranus for Computer

FGS Instrument Handbook for Cycle 24 . ... Fine Guidance Sensor Instrument Handbook for Cycle 24 > Chapter 7: FGS AstrometryData Processing > 7.2 Exposure-Level Processing . ... 7.2.2 Observing Mode Dependent Processing . ... After pipeline initialization and data quality assessments, successful observations (i.e., those that acquired the target), are processed according to the FGS observation mode: Position or Transfer. ... The corrections applied to the FGS data are as follows: . ... Transfer mode . ...

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• HDF-S Data Products
• No Shift, 180 Degree Rotation
• Same Visit, No Rotation, Large Shift

... Up: Description of program searchdup Previous: Program use . Input records are ordered per date of observation, and the list of known (observed) sources is cleared. Each record is compared in position to all the known sources. If the sky distance is less or equal to the specified one, the record is added to the list of observations for that source. If no known sources are within the specified radius, a new source is created, with the coordinates of the observation record. ...

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• Radioastronomy reduction procedures

... Posts tagged ?distance estimation? ... Since I began to subscribe arxiv/astro-ph abstracts, from an astrostatistical point of view, one of the most frequent topics has been photometric redshifts . ... Tags: cosmology , distance estimation , Lutz-Kelker bias , machine learning , Malmquist bias , Photometric Redshift , spectrum , survey , VO . ... Comment . ... Entries RSS . Comments RSS . ... General comments . ... vlk on [MADS] Parallel Coordinates . ... Entries (RSS) and Comments (RSS) . ...

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• The AstroStat Slog introduction
• The AstroStat Slog Lutz-Kelker bias
• The AstroStat Slog Malmquist bias

... To introduce you to the Python programming language, and its Visual module (VPython), which allows 3D simulation. The computer labs are held in room BOZO 112, not in the usual physics lab. ... This lab will use the Python programming language. ... Click on the Windows button in the bottom left, select "Programs", then the "A-Z" list of programs. ... Later in the course you will need to write your own VPython programs for assessment - this lab is your chance to make sure you can do this. ...

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• Computer Lab Webcasts
• CHIAKI's Introduction

... connection points . ... The point P3 is the connection between the horizontal and vertical actuators and is the axis of rotation for the tail gunner motion. processing: survey/020204/reduc We can compute P3,P5 (the moveable points) in dome centerline coordinates if we have the actuator distances and we know the positions of the above connection points in dome centerline coordinates for a given position of the tertiary (say the nominal focus position).(see actuator distances to dome centerline ). ...

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• The Arecibo User Manual for Astronomers
• Spectral-Line Observing
• WAPP - Snap Page

... CentralProcessor 0.11 documentation . BETA Processing Pipelines . ASKAPsoft is the suite of processing software developed by the ASKAP computing team to handle the pipeline processing of ASKAP observations. ... BETA processing uses a slightly different approach, particularly in the calibration method, and the set of scripts detailed here are designed to demonstrate a BETA reduction approach with ASKAPsoft. ... ASKAPsoft processing of BETA data . ... How to run the BETA pipelines . ...

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• HI observations of southern LSB dwarf galaxies from the Karachentsev catalog
• Archive of VLBI Observations Majordomo List
• New HI observations of the prototype Polar Ring galaxy NGC 4650A

... The scheduling routines assist in creating an observing list (stored in the startable) from scratch or from another list stored on disk, and computing the visibility of the stars in a specific night and array configuration. The date of observation is taken from the variable date , and the array name from the variable systemid . If these are not defined, defaults are used for date (the next night) and for array (NPOI). ... addstar , stars _char Add one or more stars to the startable. ...

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• VLTI Calibrator Selection Help Page
• Homepages of Christian A. Hummel
• Data Flow System overview

... The package AMPLE (Adaptable Minor Planet Ephemerides) is dedicated to solving a number of problems concerning minor planets with the aid of IBM-type personal computer. ... Obtaining selection of orbital elements and/ or photometric parameters of minor planets in conformity with imposed restrictions. ... The orbital elements of all minor planets used in AMPLE for 2015 have been determined in IAA on the ground of available observations in the catalogue of observations of the Minor Planet Center. ...

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• ENGAMPLE
• NAA-2
• Keywords_262

Next: Regularization in the Up: Deconvolution Previous: Deconvolution . Consider an image characterized by its intensity distribution , corresponding to the observation of an object through an optical system. ... is the point spread function (PSF) of the imaging system, and is an additive noise. ... This inverse problem has led to a large amount of work, the main difficulties being the existence of: (i) a cut-off frequency of the PSF, and (ii) an intensity noise (see for example [ 6 ]). ...

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• Analysis in the time domain
• Principle of the Program
• Time series analysis in the frequency domain

ON THE IMPACT OF THE GALACTIC ABERRATION ON VLBI-DERIVED PRECESSION MODEL Z.M. MALKIN Pulkovo Observatory Pulkovskoe Ch. ... Corrections to adopted precession rate are usually computed from the linear trends in long-term time series of celestial pole offset (CPO), which are the differences between the measured and the theoretical coordinates of the celestial pole. ... CONCLUSIONS We have estimated the impact of GA on parameters of precession-nutation model derived from VLBI observations. ...

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• http://www.gao.spb.ru/english/as/j2014/presentations/gross.pdf
• http://www.gao.spb.ru/english/personal/malkin/publ/zm14e.pdf
• http://www.gao.spb.ru/english/as/j2014/presentations/galushina.pdf

The technical memorandum: Time and Time Interval Measurement with Application to Computer and Network Performance Evaluation (PostScript) describes a number of techniques for conducting experiments typical of computer network and transmission systems engineering. ... The usual data collected during a performance run of some experiment might include time offsets, time delays, frequency offsets and various error statistics. ...

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• APOD: 2002 September 19 - Asteroid 1998 KY26
• The Network Time Protocol (NTP) Distribution
• APOD: 2013 May 14 - Galaxy Collisions: Simulation vs Observations

... The greater the distance, the smaller the parallax. ... That triangle has the same proportions as the much larger triangle ABC, and therefore, if the distance B'C to the thumb is 10 times the distance A'B' between the eyes, the distance AC to the far landmark is also 10 times the distance AB. ... The most distant objects our eyes can see are the stars, and they are very far indeed: light which moves at 300,000 kilometers (186,000 miles) per second, would take years, often many years, to reach them. ...

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• Comet Shoemaker-Levy 9
• Dayside aurora [Oulu]
• Field-aligned potential drops [Oulu]

... Galaxy Evolution home . Cavendish Astrophysics . ... Cosmological evolution of star-forming galaxies . ... Local Information . ... Mappings: Mappings is a code for the calculation of (optical) line ratios under a wide variety of conditions Mappings (Binette) . ... ZEUS is the fluid dynamics code we use for our simulations and is available on the Beowulf cluster and the Suns. It comes in a variety of flavours: ZEUS-3D full 3D code with lots of other options; can also run 2D simulations . ...

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• Understanding Infrared emission from galaxies Bojan Nikolic web pages (r. 329)
• Determination of the relative orientation between radio and dynamical reference
• G327.6+14.6

Asteroid 1998 KY26 . ... Credit Copyright: NASA , JPL , image courtesy of Steve Ostro Explanation: A day is just under 11 minutes long on 1998 KY26 , a 30 meter wide, fast-spinning, water-rich asteroid. This computer simulated view of its lumpy surface has a resolution of about 3 meters and is based on radar and optical observations (click on the image for a series of surface views). ... NASA Web Site Statements, Warnings, and Disclaimers . ... U. Based on Astronomy Picture Of the Day ...

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• Asteroid 1998 KY26
• Астронет > Asteroid 1998 KY26
• Galaxy Collisions: Simulation vs Observations

... Copyrightї1997 Bob Yen (byen@ix.netcom.com) (http://www.comet-track.com/hb/hb.html) . ... Information on Comet Hale-Bopp for the Non-Astronomer Hale-Bopp rotates about twice a day (3/14/97) . ... The Comet Observation Home Page was been selected to receive the Griffith Observatory Star Award for the week of February 2 - 8, 1997 for excellence in promoting astronomy to the public through the World Wide Web. ... Typically, about 1,000 individual users/computers access this page every day. ...

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Next: Observations and Data Reduction Up: Coronal Hole Diagnostics out Previous: Coronal Hole Diagnostics out . ... Line width variations combined with simultaneous electron density estimates, provides a very powerful diagnostic for the solar corona. ... They find that for distances of a few arc seconds outside the solar limb, the average line of sight electron densities in the coronal holes are about a factor of 2 lower than in quiet sun regions. ... The Western limb data showed a similar trend. ...

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• Observations and Data Reduction
• High Performance Computing Course
• All Ireland Computer Grid

... During all period of our investigations Dr. N.Sumzina from the Institute of Applied Astronomy of RAS had prepared the Numbered Minor Planet positions from MPC Database for our processing with kind permission of the Director of Minor Planet Center Prof. Braian Marsden. ... Our extensive processing of the MPC data allows us to conclude that CCD observations of the Numbered and Unnumbered Minor Planets have the errors, sometimes very crude. ...

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RATAN-600 radio telescope . ... In the "radio-Shmidt telescope" mode the antenna system the South sector of the main mirror with the flat mirror ("South+Flat") of the RATAN-600 radio telescope is used. ... The antenna system the South sector with the flat mirror. ... The flat and circular mirrors of the RATAN-600 form the basis of the system. ... In the case of antenna system "South+Flat" the planoid is flat mirror, the circular reflector of RATAN-600 is the second mirror. ...

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• Optimization of spectroscopic observations
• harak_e
• On the problem of high spectral resolution observations of faint objects