Next: The Corrected Gauss--Newton Up: Outline of the Previous: The Modified Gauss--Newton . This is identical to the modified Gauss--Newton method, except in the way that the Hessian matrix is approximated. ... At each iteration, a new estimation of the Hessian is obtained by adding a rank one or two correction matrix to the last estimate such that , the estimate of the Hessian matrix at the iteration, satisfies . ... After some iterations and around the optimum, converges to the Hessian. ...

Next: Constrained Iterative Deconvolution Up: Iterative/Recursive Deconvolution with Application Previous: Inverse Filtering . Iterative deconvolution begins by guessing what the true image, , might be. ... If this guess is correct, then the convolution will produce the observed image, . ... A flat field could be used as the initial guess, but then the correction factor would be the observed image, so the estimate used for the second iteration would be the observed image anyway. ...

ALMA | ... In this section, we explain why we need to correct phase fluctuations and ALMA's strategy to do this. Rapid fluctuations will be corrected with water vapour radiometers (WVRs). The Cavendish Astrophysics Group was also a leading contributor to the ALMA prototype WVRs, which were put through their paces in tests at the Submillimeter Array (SMA). ... The Cavendish Astrophysics Group in partnership with the Onsala Space Observatory built two prototype WVRs for the ALMA project. ...

... Step 1: The magnetic field line tracing from the satellite position up to magnetic equatorial plane using IGRF magnetic field model. Step 2: Tracing back from the point (produced on the Step 1) to the Ionosphere (by using only dipole magnetic field) . ... The magnetic field line tracing from the satellite position up to the Ionosphere (the stop trace altitude 110 km) using Main (dipole) + Extraterrestrial magnetic field model (for example, Tsyganenko [1987], or [1989], or [1990] ) . ...

... The current MOS procedure envisages a less complicated correction mechanism than for the PN. ... The CTI correction applies a scalar correction to the event list set, on an event by event basis, in order to correct for loss of charge which has occurred in reading out the CCD array. ... We expect to correct for a fixed amount of charge loss, and a fractional amount of charge loss, which depends on the number of row and column transfers completed. ... http://xmm.vilspa.esa.es/ xmmdoc/MOS/mos_cti.html ...

... Next: The PROS Big Up: Software Systems Previous: Data Reduction Software . ... The srcinten task provides PROS users with a tool to compute count rates for point sources in the ROSAT High Resolution Imager (HRI). ... Corrected upper limits are cited at locations where the count rate falls below the source detection threshold. ... Srcinten is a new PROS task that computes and applies the above correction factors to the net counts in a user-specified aperture. ...

... Step 1: The Footprint position calculation by the magnetic field line tracing from the satellite position up to the Ionosphere by using IGRF + Tsyganenko [1987] magnetic field model (the stop trace altitude 110 km). Step 2: Tracing back from the Footprint (produced on the Step 1) to the dipole equatorial plane (by using only IGRF magnetic field model up to the geocentric distance 8 RE and dipole field model after this distance). ... Back to the description . ...

In 1995 Eugene set an annual rainfall record by recording, officially, 65.56 inches of rain. ... The mean annual rainfall for Eugene from the 25 year period 1970-1994 was 51.5 inches with a dispersion of 8 inches. ... Wettest Years: . ... Below are the official NWS corrected rain totals for the year 1996. Although these are now "official", I go on record here by saying there is no way I believe that Eugene, Oregon received 101 inches of rain in 1996. ... January: Old = 14.74; corrected = 14.48 . ...

... There are a number of "fixes" that are important for short wavelength ATCA data, especially at the 3mm band. ... By default atfix applies the ``standard'' gain/elevation model for the antennas. ... As mentioned in Section 11.1.2 , the ATCA uses a paddle to measure an above atmosphere system temperature. ... On the night of an ATCA reconfiguration, a solution for the antenna positions is derived. ... Task atfix corrects the data for an improved antenna location solution via the dantpos parameter. ...

The Planewave Instruments 20-inch (0.5-meter) f/6.8 corrected Dall-Kirkham telescope at Moore Observatory in Kentucky and its identical companion at Mt. ... The CDK20 North at Moore Observatory has been our primary platform for developing technology for remote and robotic operation in the Shared Skies program. ... g'r'z'i' filter wheel . ... Axis quad video server to send realtime video to the remote observer . ... Telescope monitor camera in the dome also on the video server . ...

Arecibo Upgrade Notes INSTRUMENTAL POLARIZATION : POLARIZATION ISOLATION ERRORS IN STOKES PARAMETERS Jim Cordes Joe Lazio 22 May 1996 Summary The purpose of this memo is to: 1 demonstrate how polarization isolation is related to errors in Stokes parameters ; 2 estimate a tolerable level of errors in Stokes parameters due to amplitude and ... There we had a level of cross coupling that gave about 10 errors in Stokes parameters. ...

... 8, ``Celestial Mechanics'', 2002 Solution stabilization algorithms for the estimation of small bodies orbital parameters L. E. Bykova, V. P. Titarenko Tomsk State University, Tomsk, Russia Sometimes there is not enough information for the correct improvement of the orbits of the Solar system small bodies. ... Algorithms have been constructed on the basis of a linear least squares method using additional a priori information about the solution. ... E., Hanson R. J. Solving Least Squares Problems. ...

... Science . ... Science Users Information > Data Handling and Products > Data Reduction FAQ > How good is HAWKI astrometry and how are PSF variations corrected? ... Science Users Information . Observing Facilities . ... Paranal Facilities . La Silla Facilities . ... Future Facilities and Development . ... Observing with ESO Telescopes . ... Science Software . ... Science Data Products Forum . ... Science Archive Facility . ... ESO Data . ... ESO Data Access Policy . ... ESO Science Newsletter . ...

... Basic Observables: Zero-differenced phase and code ionosphere-free combinations of global GNSS network stations, corrected by P1-C1 satellite code biases (cc2noncc), daily observations with 30 seconds sampling rate Sites coordinates : IGb08 reference frame coordinates and velocities Displacements: solid tides, ocean loading, pole tide loading (IERS 2010) Geometric model : Receivers antennas eccentricities, absolute receiver and ...

For non-spherical isotropic particles, the classic variant of the RDG approximation does not include the anisotropy of the shape and hence does not give the correct Rayleigh limit, say, for small ellipsoids. ... We call this variant a modified RDG approximation (MRDG). ... First, the MRDG leads to the correct Rayleigh limit. ... The second approach to generalization of the RDG is connected with the use of the Born iterations for the scattering integral equation [ 95 , 124 , 132 , 264 ]. ...

... Posts tagged ?density estimation? ... Tags: catalog , convex hull peeling , density estimation , DR6 , massive data , multivariate analysis , nonparametric , SDSS , SQL , voronoi tessellation . ... Algorithms arXiv Astro Bad AstroStat Bayesian CHASC Cross-Cultural Data Processing Fitting Frequentist Galaxies gamma-ray High-Energy Imaging Jargon Job Languages MC MCMC Meta Methods Misc News Nuggets Objects Optical Physics Quotes Spectral Stars Stat Timing Uncertainty X-ray . ... SAMSI AstroStat Prog. ...

... A Posteriori Guidance for Astronomical Images P. Melon, M. Guillaume and Ph. ... When pro­ cessed, successive frames are grouped in blocks of the same size (between 1 and 10 frames per block). ... Algorithm Thereafter we consider that an elementary, i.e., a high temporal resolution image, is built from all events included in a block of frames by a simple pile­up of photoevents at their original X­Y address. ... In the algorithm, the only free parameter is the number of frames per block. ...

Please enter the lightcurve file name and period search parameters: . Lightcurve file: . ... Apply the Heliocentric correction and convert all dates to Terrestrial Time (TT)? ... Also, the Heliocentric correction cannot be applied to such lightcurves. ... This period search service is also available at the mirror sites: Mirror 1 , Mirror 2 , Mirror 3 , Mirror 4 . You may download the latest source code distribution and install the period search service at your own web server. ...

... 2014 Irkutsk-Listvyanka, Russia G r o u p language English Theoretical round General note. ... Footstep of babr. ... Draw in real scale a picture of image of the sunspot "footstep of babr" (see picture and condition of the previous problem) obtained in the focal plane of the LSVT. ... Orion's Belt. ... Estimate at what distance from the Babr the Penguin was, if the shining of the "fourth star of Orion's Belt" approximately corresponds to that of the three others in the picture. ... ISS near Zenith. ...

... In brief: the frequency-dependent radiative transfer equation is solved for a dust under assumption of spherically-symmetric geometry for its distribution taking into account particle size distribution and quantum heating effects for the very small dust particles. ... Table: Model parameters for IRAS04296+3429. ... parameter . ... hot dust shell) . ... The best fit to the spectral energy distribution of IRAS04296 is shown by heavy solid line (see Table2 for details concerning parameters of the model...