On Systematic Differences in Individual Solutions and IERS Products Zinovy Malkin Institute of Applied Astronomy RAS, St. Petersburg, Russia 1 Present status Proper determination, modelling, and accounting for systematic differences between contributed series is of the great importance in compilation of the IERS products. ... Possible sources of systematic differences are: · Different reference systems (e.g. TRF, CRF, geopotential, time scale). ... 87 IERS Technical Note No. ...

... Baffa, C., Giani, E., & Checcucci, A. 2003, in ASP Conf. ... 314 Astronomical Data Analysis Software and Systems XIII, eds. F. Ochsenbein, M. Allen, & D. Egret (San Francisco: ASP), 157 . ... To be useful, Skysoft needs to be a long-lived project, setting little pressure for maintenance, imposing a very low nuisance level to the developers community, and requiring a low maintenance cost. ... This site is designed so that software developers acquire more visibility because of astronomical context. ...

About Zones of Resonant Returns of Asteroid Apophis . ... Asteroid Apophis is one of extremely dangerous NEOs. ... Using analytical and numerical tools, we investigate the loss of precision after the Earth approach in 2029 and the possible approach in 2036. ... Possible trajectories of collisions with the Earth have been found analytically and numerically in this chaotic region. To construct these trajectories we used quasi-random intermediate motions, made up from resonant collision orbits. ...

In this new series we present observations and modelling of spectral lines formed in main sequence star chromospheres (from G0 to M8). in this paper, we discuss the Hydrogen line formations in very active dMe stellar chromospheres. ... Our final model atmosphere is described in the next paper in this series. ... We found that observations are best reproduced by a chromospheric structure including a constant temperature gradient (in a log(M) scale) in the chromosphere and transition region. ...

Direct Electron Imaging Using Back Thinned CCDs . ... A proximity focused Gen III image intensifier has been built using a back illuminated 512 x 512 CCD in place of the phosphor screen. Signal to noise, spatial resolution, minimum resolvable signal and life are discussed. ... Very low light level imaging is driven by the need for high quantum efficiency detection of single photons at the highest possible speed and the highest spatial resolution. ...

The preliminary version of documentation of the format for the interchange of calibrated optical/IR data being developed by Tom Pauls of NRL and John Young of COAST was presented and a number of issues discussed. The proposed format is in the general form of a relational database with different components stored in FITS binary tables. ... Should there be a single data table type that includes all data types, or multiple table types, one per data type? What data types are needed? ...

... Conference . ... for optical telescopes of small and medium size (up to 3-m in aperture) to be discussed. Current Status and New Projects of Small- and Medium-Size Optical Telescopes . ... Science with Small- and Medium-Size Optical Telescopes . ... 12 May 2015 - First announcement . 1 June 2015 - Registration opens . 10 June 2015 - Abstract submission opens . ... 10 September 2015 - Programme available . 19 October 2015 - Conference opens . 22 October 2015 - Conference closes . ...

Next: Results Up: Adaptive Regularized Restoration Algorithms Previous: Introduction . For the algorithms discussed here, the restoration approaches have been formulated to handle the problem of an image degraded by a spatially invariant or spatially variant blur operator with additive Gaussian noise. ... Iterative approaches may be used to solve this inverse problem very effectively. ... In order to solve for an optimal restored image and regularization parameter at each iteration, we use . ...

... The purpose of the meeting was to review the current status of project development and to discuss working plan for international cooperation on the stage of preparation to the launch. 22 foreign specialists participated in the meeting representing Australia, Canada, China, Finland, Japan, the Netherlands, Ukraine, United Kingdom, and USA. ... To define personal content of proposed working groups and to develop plan of their activity for 2003 year (15 November 2002, chairmen of working groups). ...

... The pulsar consortium met on 1-2 November 2002 in Arecibo. ... Preliminary parameters for the pulsar surveys will produce on the order of 1 Pbyte of raw data over the course of 3-5 years. ... Young canonical pulsars (galactic plane) . ... The Parkes Multibeam Pulsar Survey adopted an integration time of 2100 sec. Surveys with ALFA need only 20 sec to match this sensitivity, but we want 300 sec to go much deeper. ... For pulsar surveys, we require the following in a spectrometer: . ... Jim . ...

... I determine th as a time period (from some moment in the past till the present moment) during which papers responsible for 1/2 of the total citation index were published. Parameter Nt represents averaging of the citation index over this period: Nt = C.I./2th 1 Intro duction The problem of estimation of an impact of a scientist (or a group of them) is an actual one (see, for example, [1] and references therein). ... One published in 1965 a paper with C.I.=5000, and nothing after that. ...

... The visibility datasets possibly contain correlations for different polarizations and Stokes parameters. There are two basic ways that polarization characteristics can be measured: firstly, two orthogonal feeds can be present on the antennas, and the four different polarization correlations from a baseline can be taken and recorded. ... There are two ways the user can determine which polarizations he or she wants to process, either with the select parameter, or with the stokes parameter. ...

... Contemporary State ol SETI Problem In Russia . ... Presently the scientific and technological civilization on Earth possesses only one method of searching for extraterrestrial civilizations in outer space - the method of remote observation by scanning, optical and radio data from the surrounding space and by trying to detect and. recognize possibly intelligent signals. ... Theoretical Foundations ot the Contact oi Intelligent System. ... Intermediary Languages for the Contact ot Intelligent Systems....

... Future seminars . ... On Control of vortex interaction " . D.L. Vainchtein (IKI RAN; Dept. of Mechanical and Environmental Engineering, University of California Santa Barbara, USA) . ... In the present talk I look at two different methods of controlling the interaction of two 2D vortices. ... The setback of this method is that it destroys original flow structures and is very energy consuming, as it must overcome the original dynamics. ... We call this method "adiabatic control". ...

... Recently V.Drinfeld proved that the scheme of maps from a formal disc to a (possibly singular) algebraic variety for which the image of the generic point of the disc is non-singular has essentially finite dimensional singularities (we shall explain Drinfeld's result in detail). We shall present a conjecture about a possible application of the above result to the study of automorphic L-functions and discuss some specific examples. ...

... The dates for the 3 rd Asian-Pacific Astronomy Olympiad are November 21-29. ... See personal data of the previous APAO as an example. ... Teams may stay in Xiamen since two days before before November 21 and two days later November 29, i.e. it is possible to arrive since November 19 and depart not later December 1. ... Monday November 19 Possible delegations arrive . Tuesday November 20 Possible delegations arrive . ... Friday November 30 Possible delegations depart . ...

... Two high school students from Texas and Louisiana are the winners of the 2012 Priscilla and Bart Bok Awards for their astronomy projects presented at the Intel Science and Engineering Fair in Pittsburgh, Pennsylvania in May. The awards were presented on May 18 by the Astronomical Society of the Pacific (ASP) in partnership with the American Astronomical Society (AAS), supported by funding from the National Science Foundation (NSF). ... The Bok prize is named for Bart and Priscilla Bok. ...

An improved correlator for ALMA has been proposed by an European consortium including Astron (NL), Bordeaux University (FR), IRAM (FR) and Arcetri. ... The work in Arcetri has focused on the efficent design of a digital receiver, that exploits the peculiarities of the astronomical signal, i.e. the extremely coarse quantization and the stochastic nature of the input signal. ... A complex mixer followed by a two stage bandpass filter. ... Phase effects in a hybrid correlator . ...

... Home Gallery Club Events AAA president Marcelo Cabrera presents AAA Amateur Astronomers Medal to Al Nagler of TeleVue Optics with AAA vice-president Susan Andreoli. ... A History of the First Forty Years of the Amateur Astronomers Association . ... AAA president Marcelo Cabrera presents AAA Amateur Astronomers Medal to Al Nagler of TeleVue Optics with AAA vice-president Susan Andreoli. by . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

... click image to view discuss) . ... Bert improved his composite image showing details of the corona. ... He also did a better job of color correction, avoiding a false light bluish hue that was present near the 6 o'clock position on the moon's limb in the earlier image. ... of this image is the seventh-magnitude star SAO 109216. Submitted by Bernie Volz on 05/08/2006 22:12:59 . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...