An ephemeris can be calculated with different accuracy. Calculation accuracy dialog presents three modes of accuracy. One can calculate position of a minor planet by the formulae of elliptic motion starting from the fundamental set of elements for given minor planet. ... Also there is possibility to calculate positions taking into account perturbations from different sets of perturbing bodies by numerical integration ( Integration mode). ... Accuracy of integration is equal to 10**(-10) AU. ...

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... Watchouts . ... Spectral fitting programs such as XSPEC apply the proper renormalization to the background spectra, using the value of the BACKSCAL keyword in the header of the spectral file(s). The SAS task backscale calculates the BACKSCAL value. backscale is automatically run, when a spectrum is extracted via xmmselect . Users must be aware that the current implementation of backscale employs the full area of the spectrum extraction region, save the (known) bad pixels/columns. ...

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• Future developments
• Algorithm
• Relative Corrections

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... The algorithm and appropriate program for decametric radiosignal propagation conditions prediction for paths from 500 to 9000 km have been developed at ISTP SB on the basis of normal wave method (AltyntsevaB.I,Iliyin N.V., Kurkin V.I. and others //Decameters channel simulation on the base of normal wave method . ... Solar activity indices are chosen automatically from the prediction date from the database . ...

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• East Siberian Center for the Earth's Ionosphere Research. VS data on-line

Program: MOMENTS Purpose: Program to calculate moments and other properties of a profile Category: MANIPULATION, CALCULATION, PROFILES File: moments.c Author: M. Vogelaar Keywords: INSET= Give set (, subsets): Maximum number of subsets is 2048. ... 3: Physical coordinate of peak value in profile. ... If there are a certain number of adjacent subsets with amplitudes within the given range, and this number of subsets is greater than or equal to WINDOW, these sub- sets are taken into account. ...

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• moment
• Errors associated with reducing filterbank data
• Tools - Software - BusyFit - User Manual v0.2

... Since image restoration algorithms are highly sensitive to the accuracy of the calculated PSF, a significant portion of our research effort is devoted to accurately modeling the PSF which is a highly non-linear problem. Our approach is based on analytical modeling of the wavefront phase using Zernike polynomials. ... In the Fourier domain, we scale the phase map by an observed PSF to more accurately account for the HST/FOC combination. ... The final result is an improved estimate of the phase map. ...

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• Space Telescope Imaging Spectrograph Instrument Handbook
• ACS Instrument Handbook for Cycle 20
• ACS Instrument Handbook

Rotang can either be run from the command line as described here or through the alfa_ang GUI . ... To run rotang at Arecibo: . Start IDL . ... rotang, Date , RA , Dec , Time , /choice . Here Date takes the format YYMMDD (e.g. 041128 for the 28 th of November, 2004). ... Rotang also calculates the Azimuth and Zenith Angle fir every source. If the Zenith Angle is greater than 20 degrees, then the program will return that the source is down and will not calculate an optimum ALFA angle. ...

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• Alfa_ang - IDL procedure for calculating the optimum rotation angle for ALFA
• pdev_software

... The procedure of radiometer signal integration can be considered as a sort of reducing dimension of the initial sampling space, where the samples are the result of analog-to-digital conversion. ... The probability distribution of the signal and spikes is completely known. ... The quality of the considered algorithm could be also illustrated by Figure 2 . ... One could see the considered adaptive algorithm is preferable even by low degree of compression, because all spikes have been depressed. ...

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• A Method of Integrating
• Introduction
• Observational data

Next: Imaging by an Optimizing Method . ... A big advantage of this numerical integrator is its stability: the error in the semi-major axis and the eccentricity depends only on the step size and does not grow with an increasing number of time steps. ... As the integration time increases, the numerical results become more contaminated by various errors. ... A new symplectic integrator produces no secular truncation errors in the actions of a Hamiltonian system. ...

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• Imaging by an Optimizing Method
• Modelling Spectro-photometric Characteristics of Nonradially Pulsating Stars
• Recreating Einstein Level One Processing Exposure Masks and Background Maps in

Next: *upspecrdf, downspecrdf* - Transform Up: Spectral Analysis Previous: *grid_plot* - Plot Results . The conversion of count rate to flux depends on the intrinsic spectrum of the source, so xflux must be used in conjunction with fit . Fit generates a table of the best fit intrinsic spectrum ( _int.tab extension). xflux uses this table to calculate either the integrated flux between two energy limits or the flux density at a specific energy. ... This produces ``..._obs.tab'' file. ...

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• Funtools and DS9 Image Display
• The AstroStat Slog mean integrated square error

... The described algorithm is suitable for measurements of complex images of stars. ... a) the zero-based number of stars in the complex (multicentric) image, . b) set of preliminary coordinates - x i , y i , for all stars, index i is number of a star, . ... i - index of a star in the complex image; . ... These parameters are calculated by a nonlinear method of a least squares.The main output parameters of this algorithm are x i , y i ; where the index i is number of a star in the multicentric image. ...

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Geomagnetic storms and substorms are a natural hazard similar to hurricanes, floods etc. ... Solar and geomagnetic activity also probably influences the Earth's climate and human health. ... Under southward directed IMF the Earth's magnetosphere is open to input from the solar wind flow. ... Since practical importance of solar wind measurements was recognized, a number of approaches was developed for prediction of the geomagnetic activity basing on the solar wind data. ...

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• The INTERBALL Tail PROBE orbital elements
• The INTERBALL Auroral PROBE orbital elements
• About modification of the INTERBALL orbital elements

. Please standby and you will be automatically connected to the new location of the unframed Supernova page. Or, click on the link above. If you have questions or problems, please email me at David Bishop dbishop@vhdl.org . Last modified: Mon Aug 27 12:40:15 EDT 2001

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... D.A.Varshalovich, A.V.Ivanchik, A.Orlov, D.A.Varshalovich (Ioffe Inst, St-Pb) "Primordial nucleosynthesis as a probe of possible deviationof fundamental physical constants" . Influence of coupling constant deviations from their current values on the abundances of 4 He, 2 D+ 3 He, and 7 Li nuclei produced during the primordial nucleosynthesis is studied taking into account the possibility of simultaneous variations of the gravitational and electroweak constants. ...

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• The COOC Criterion (Criterion of Observations versus Calculations)
• Discussion
• #tex2html_wrap_inline12527#-#tex2html_wrap_inline12529# for Supernova...

SKA ­ TDT Group On Phase Computation during Folding C.Baffa, E.Giani January 2014 The last part of pulsar search algorithm, as in the SKA TDT group approach, is the verification and optimization of pulsar parameters candidates identified in the previous phases. ... As the phase errors are expressed as fractions of the full period (in our case 44 measurement of 50 s), it is evident that the maximum integration time compatible with single precision phase computation is very short. ...

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• http://www.arcetri.astro.it/irlab/doc/library/nr/f4-0.pdf
• http://www.arcetri.astro.it/irlab/doc/library/recipes/bookcpdf/c4-0.pdf

The VLTI Calibrator Selector Tool is a tool intended to assist in the selection of suitable interferometric calibrators for VLTI observations with MIDI and AMBER. It uses a model of the VLTI and its instruments to assess the fringe visibility, given the observed bandpass, the geometry, spectrum, and coordinates of the target and the time at which the observations are to be made. ... The tool offers an HTML/Java based interface and consists of two pages. ... The quality flag depends on LDD_chi2. ...

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• phoenixMonitor
• P2PP V2.4 Integration Test Plan
• QC Procedure: DFOS operations under VNC

Next: Sky Subtraction Up: Construction of Flat Previous: Standard construction . For a number of projects where very deep integrations and accurate flat fields are required, and the targets are point sources or much smaller than the frame size, the sky background itself can be used to calculate the flat field. ... Use STATISTICS/IMAGE to calculate the image median, and COMPUTE/IMAGE to divide by this to get the normalised flat field. ...

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• Documentation: LEDA: parameter:
• TRANSF/WAVE
• Spectral Analysis

National Research Institute for Physical-Technical and Radio Engineering Measurements IMPROVEMENT OF THE SOFTWARE BERNESE FOR CALCULATION OF THE EARTH ROTATION PARAMETERS ACCORDING TO THE DATA OF SATELLITE LASER RANGING (LAGEOS 1, LAGEOS 2) IN THE MAIN METROLOGICAL CENTRE OF THE STATE TIME AND FREQUENCY SERVICE Tsyba E. N., Kaufman M. B. 141570, Mendeleevo, Moscow region, Russia tel. +7-903-194-7575; tsyba_e_n@mail.ru ABSTRACT Preparatory ...

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• http://www.gao.spb.ru/russian/psas/ffk2013/tfiles/yerokhin_H2_FFK13.pdf
• Pulkovo NEO Page: Estimation of Observational Accuracy
• Pulkovo NEO Page: Ephemeris Support

Algorithm for calculations of the Voigt function . ... алгоритма расчета профиля Фойгта ! ... функция Фойгта ! текст модуля на языке Паскаль (Delphi) для ее вычисления ! ... github.com...dawson.cpp процедура Хумличека для вычисления функции Фойгта ! ... Humlicek 1979 JQSRT v21 p309 ! ... 2005A+A___442___11F 2006 Tepper-Garcia, MNRAS, v369 p2025 ! 2006MNRAS_369_2025T 2007 Letchworth and Benner, JQSRT, v107 p173 ! ... 2009JQSRT_110__376A 2014 Abrarov and Quine, J. Math. ...

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... file but would like it to be automatically updated # again, run the following command: # sudo dpkg-reconfigure -phigh xserver-xorg Section Files EndSection Section InputDevice Identifier Generic Keyboard Driver kbd Option CoreKeyboard Option XkbRules xorg Option XkbModel pc105 Option XkbLayout us ...

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• MASTER : List of HAZARDOUS ASTEROIDS (PHA) and COMETS discovered by MASTER

Microsymposium 38, MS067, 2003 (A4 format) SURVEY OF MARS CRATER TOPOGRAPHY FROM MOLA DATA. Michael G. G., European Space Agency, Research and Scientific Support Department, ESA/ESTEC, Noordwijk, The Netherlands, greg.michael@esa.int An algorithm for autonomous identification of crater centres from topography data has been improved in accuracy since [1,2] by taking account of the slope direction on the interior of the crater rim. ... References: [1] Michael G. G. (2002) Vernadsky-Brown 36, abs. ...

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• http://selena.sai.msu.ru/Pug/Publications/ms42/m42_60.pdf