... Computing the pointing error . ... The platform can be rotated by pulling on the tie downs or redistributing weight on the platform. ... The horn rotates through the same angle as the platform. ... The plots show the computed pointing error for different platform rotation angles (.ps) ( .pdf ): . This shows the pointing error in as you tilt the platform. ... B2209+080 has the pointing errors with no tilt. ... The computed pointing error for a platform tilt track the measured errors pretty well. ...

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• optics
• Pnt correction after may11 level platform.

... Posted by hlee . ... Click for what was appeared in arXiv this week. Continue reading ?[ ... Category: arXiv , MCMC , Uncertainty | ... 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 . ... Just searching by photometric redshifts in google scholar and arxiv.org provides more than 2000 articles since 2000. ... Category: Algorithms , arXiv , Data Processing , Galaxies , Stat | ...

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• The AstroStat Slog Blog Archive Change Point Problem
• The AstroStat Slog Blog Archive Reduced and Processed Data
• The AstroStat Slog Blog Archive Photometric Redshifts

... On-line calibration consists of calibration operations performed to maintain the ALMA observing system properly tuned to successfully execute the planned observations. ... Among processing operations are the calibration of the atmospheric absorption, of phase radiometric correction, of pointing scans, of phase and amplitude reference measurements, .. ... In the mean time tests of the calibration software will proceed using both simulated data and data from the antenna prototypes...?re 1 . ...

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• The Grid Signal Processing System
• Simulations of Pinhole Imaging for AXAF: Distributed Processing Using the MPI
• Joint Processing of Radio Data Produced by the SSRT Together With Data of Other

... The task first computes a background image in order to identify pixels that may be part of a source. The task uses two different algorithms for detecting ``point'' and ``extended'' sources. ... This is necessary because some faint ``point'' sources may have been missed by the point-source detection algorithm, but picked up by the extended-source detection algorithm. ... When the detection process is finished a check is made on extended sources to see if they can be split into two or more sources. ...

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• Processing OM Image mode data
• Generation from In-Orbit Data
• Comments on Individual Table Columns

... Convert from raw counts to count rates by dividing each data point by exposure time and correcting for disabled diodes. ... For paired aperture or spectropolarimetry observations, a second flatfield file is used. fl1hfile,fl2hfile . ... Object data are normalized to the reference aperture used to derive the average inverse sensitivity used in AIS_CORR. ... Uses inverse sensitivity file (iv1hfile) and, for paired aperture or spectropolarimetry, file (iv2hfile). iv1hfile,iv2hfile . ...

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• http://www.stsci.edu/hst/observatory/documents/isrs/osg003.pdf
• The Hubble Deep Field - image registration combination
• Fine Guidance Sensor Instrument Handbook

... User Guide ] Task: mfboot Purpose: Set the flux scale of a visibility dataset. Categories: calibration MFBOOT is a MIRIAD program that corrects the flux scale in visibility datasets. In doing this, it assumes that the flux density scale is out by a constant scale factor. ... Key: vis Input visibility datasets. ... Key: mode MFBOOT can process the data in one of three modes: "triple", "scalar" and "vector". ... In "triple" mode, MFBOOT compares the triple product of the data and model. ...

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• kpvslice: interactive position-velocity slicing
• The Joint Approach
• Some Additional Tools

... The first of the equations defines the position of the spectral orders, m , in the raw image, while the second equation gives, for each order, the dispersion relation in one dimension. ... where the coefficients are computed using least squares techniques on a grid , i.e. sample number and line number of points located within the spectral orders of the image. These points in the grid are found automatically by an order--following algorithm, normally using the FLAT or STD image. ...

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• Arcsecond Positions of UGC Galaxies
• Artifacts
• Source Positions

... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

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• Potential Energy

... Current APO Weather . ... Search Site . ... Information for New Users . ... Technical Staff pages . Night Logs and Mailing Lists (maintained by APO) . ... Technical Documents and Database Search . ... Observer's Documentation and Procedures . ... Problem Reporting and APO Technical Documents Database Search . ... APO Drawing/Document Management Procedures . ... APO Technical Documents Database Search . Home Astrophysical Research Consortium . ... Mail Lists (maintained by APO) . ...

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• M1 Airflow Lab Tests
• Astrophysical Research Consortium - Apache Point Observatory
• MILT Description

Once students get the hang of it, they can find and measure the brightness of Delta Cephei in a few minutes. ... of Delta Cephei . ... Oct. ... The following table lists the measurements of Delta Cephei made by one amateur astronomer in autumn 1990. ... 4.0 . ... This activity is a simplified version of one that appeared in Hands-On Astrophysics, a series of activities prepared by the American Association of Variable Star Observers with support from the National Science Foundation. << previous page | ...

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• ASP: Using Multicultural Dimensions to Teach Astronomy
• ASP: To Every Season There is a Reason
• ASP: Biography of a Star: Our Sun's Birth, Life, and Death

... A comparison of the computed and experimental relations F max ( H), as well as comparison of drift scans of point sources across different horizontal cross-sections of the BP with the corresponding computed cross-sections were made. ... The drift scans of the point source 3С84 (H=87 o ) at the wavelength 7.6 cm across the horizontal cross-sections of the BP (black lines) and the computed horizontal cross-sections of the BP corresponding to them (red lines). ...

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• Work Scan Program + Data Viewer (IDL widget)
• Description of algorithm
• harak_e

... The complexity of inversion of Goldreich's function by backtracking algorithms. ... In 2005 M. Alekhnovich, E. Hirsch and D. Itsykson proved the exponential lower bound on the complexity of inversion of Goldreich's function based on linear predicate and random graph by myopic bactracking agorithms. ... Motivated by applications to string algorithms, we introduce the following subclass of Monge matrices: a matrix is called unit-Monge, if its density matrix is a permutation matrix. ...

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• Algorithms in Bioinformatics

... With enough velocity, a spacecraft can break loose from the Earth's gravity and enter an orbit around the Sun, like that of a planet. If it then orbits the Sun with the same period as the Earth--one year--it may keep a fixed position relative to Earth. ... If the distance is just right--about 4 times the distance to the Moon or 1/100 the distance to the Sun--the spacecraft, too, will need just one year to go around the Sun, and will keep its position between the Sun and the Earth. ...

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• Space Weather Dials Interpretation Guide
• Trigonometry--what it is good for?
• Energetic Particles

... sin f = y / r . cos f = x / r . ... They are now viewed as new definitions of the sine and cosine, for the polar angle f given by x and y ( a slightly different way of formulating this definition is described further below ). ... sin 2 f + cos 2 f = 1 . ... Angle . ... Many trigonometry texts define the sine and cosine slightly differently, using the so-called unit circle . ... Then the distance AB ("the sine line") equals sin a , and the distance OA ("the cosine line") equals cos a . ...

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• The Lodestone
• Trigonometry--what it is good for?
• How Orbital Motion is Calculated

... I would several points which we faced during our everysolved for better quality of individual ACs' and EOP products · There are two main EOP products provided by two IERS Product Centers on Earth Orientation (Earth Orientation Center (EOC) and Rapid Service/ Prediction Center (RSPC)). ... However, the latter is not provided by the IERS. ... ITRF · Using ITRF in computation of EOP series produced by various ACs seems to be a necessary condition to provide the consistency between the IERS products. ...

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• http://www.gao.spb.ru/english/as/j2014/presentations/suvorkin.pdf
• The Canadian S2 Correlator - Principles of Radio Interferometry

Next: Imaging Polarimetry with NICMOS Up: NICMOS Data Calibration and Previous: The Photometric Performance of . ... NICMOSlook and Calnic C . ... Extracting spectra from a large number of NICMOS grism images requires a convenient interactive tool which allows a user to manipulate direct/grism image pairs. ... NICMOSlook and Calnic-C are two programs that were designed to take advantage of the fact that the NICMOS grism mode typically consists of taking both a direct and a grism image. ...

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• Some Experiments with the Restoration of NICMOS Camera 2 Images of OMC-1
• The Photometric Performance of the NICMOS Grisms
• Imaging Polarimetry with NICMOS

Modules | ... Apache HTTP Server Version 2.2 . Apache > HTTP Server > Documentation > Version 2.2 . ... This document describes what a Multi-Processing Module is and how they are used by the Apache HTTP Server. ... Choosing an MPM . MPM Defaults . ... The Apache HTTP Server is designed to be a powerful and flexible web server that can work on a very wide variety of platforms in a range of different environments. ... At the user level, MPMs appear much like other Apache modules. ... mpm_winnt . ...

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• Algorithm
• IBIS - Flat Fielding
• Educator's Guide to Impact Craters

Stellarium 0.12.3 . ... Classes . ... gSatTEME Class Reference . Sat position and velocity predictions over TEME reference system. ... Set compute epoch for prediction. ... gVector љ . ... Get the TEME satellite position Vector. ... Get the Geographic satellite subpoint Vector calculated by the method compute SubPoint. ... gVector Satellite position vector meassured in Km. x: position[0] y: position[1] z: position[2] . ... gVector Satellite Velocity Vector measured in Km/s x: Vel[0] . ...

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• Stellarium: Skybright Class Reference

These observations are aimed at fully charactering FORS1 photometric system (UBVRI zero-points, color-terms and extinction coefficients) for the Tektronix 2048x2048 pixel CCD (24µm px) . To this aim, the two Landolt/Stetson photometric fields SA95 and SA101 will be observed on a number of epochs and at different airmasses during February and March 2007. ... SA101 . ... OBs for SA101 have to be observed during evenigh twilight (exceptions are expected for the second half of March) . ...

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• GOODS
• ESO - I want to process MOS data of the same target from different nights
• Astrometry

Warning: This is a collection of pointers (growing since 1994) about me, not a home page! ... My PostgreSQL page (locale support, GiST, tsearch2) . ... OpenFTS full text search engine . ... AstroNet (in Russian) - Knowledge Base on Astronomy . ... nature.web.ru (in Russian) - Scientific network . ... Oren Etzioni's Home Page (Web Clustering) . ... Richard K. Belew home page (AI in search engines) . ... Sabine Mayer home page - staircase join-enhanced PostgreSQL 7.3.3 . ... oleg@sai.msu.su ...

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• Evgeny Rodichev home page
• APOD: 2012 December 7 - Earth at Night
• Intro