Next: Scattering properties Up: Polarization properties (transmitted radiation) Previous: Linear polarization: wavelength dependence . Traditionally, the main problem considered in connection with circular interstellar polarization is the meaning of the wavelength where changes the sign . ... This is also demonstrated by Fig. 19 (lower panel) which shows the wavelength dependence of the factors of linear and circular polarization for particles of magnetite as was done by Shapiro ([ 1975 ]). ...

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• Linear polarization: wavelength dependence
• Polarization properties (transmitted radiation)
• Polarization efficiency: size/shape/orientation effects

Abstract -- The strengths of magnetic fields in interstellar gas clouds are obtained through observations of the circular polarization of spectral line radiation. ... To infer information about these irregularities from the observational data, we develop statistical relationships between the rms values of the irregular component of the magnetic field and spatial variations in the circular polarization of the spectral line radiation. ...

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Подписка на рассылку обзоров astro-ph на Subscribe.Ru . ... Предыдущий выпуск (N335) . ... Обсудить на форуме Scientific.RU . ... Подписка на рассылку обзоров на Subscribe.Ru . Обзоры препринтов astro-ph . ... Собственно обзоры препринтов. ... Ранее обзоры также были на Астронете и на Scientific.Ru . ... АНКи доступны на Астронете , а с 2006 по 2008 г. также на сайте Элементы.Ру . ... Ранее они также размещались на сайте Астронет и в архиве моих обозрений (кодировка KOI8) на сайте Scientific.Ru . ...

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• АНКа Дня: Обзоры препринтов astro-ph
• Новости науки

... Tobia Carozzi Onsala Space Observatory Chalmers University, Sweden AAVP workshop, Cambridge, 8 Dec 2010 Tobia Carozzi SKA polarimetry Motivation Cross-polarization Eect of IXR on SKA science Summary SKA Polarimetry Brief Polarization purity a.k.a is a key parameter in SKA sp ecication cross-p olarization ratio ( ... Dep ends on calibration & science: If only raw calibration => IXR (or raw XPR) needs to be good If full calibration => IXR can be much less! ...

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• http://www.mrao.cam.ac.uk/~bn204/mk2/publications/2004/dusty04-gmrt-spitzer-poster.pdf
• ALMA Phase Calibration Techniques at the Cavendish Astrophysics Group
• How to create a gain (or other calibration) table for CASA Bojan Nikolic web

Instrument . ... Scanning TV-sensor with on-board data recording system for global coverage mode . ... recording, direct transmission . ... IR-radiometer for global coverage and direct data transmission modes . ... The scientific instrument package onboard the Meteor-3 spacecraft provides for regular instant acquisition of images of cloudiness and Earth surface in visible and infra-red bands, data on air temperature and humidity, sea surface temperature and clouds temperature. ...

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RFI SUBTRACTION WITH A REFERENCE HORN: APPLICATION TO PULSARS AND VLBI F. H. Briggs (1) , M. J. Kesteven (2) (1) Kapteyn Astronomical Institute, Postbus 800, 9700AV Groningen, The Netherlands, fbriggs@astro.rug.nl (2) CSIRO Australia Telescope National Facility, P.O. Box 76, Epping, NSW 1710, Australia, mkesteve@atnf.csiro.au ABSTRACT Cross correlation of an RFI reference signal with the corrupted radio astronomy data ... Fig. ... PHASE A B C D 1 2 1 2 1 2 1 2 Fig. ...

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• http://www.mso.anu.edu.au/~fbriggs/URSI/rfi_paper.pdf
• Index of /~bessell/FTP/Andreas
• Two-channel polarimeter, 74"

A spectrometer with 16 input channels (8 dual polarization), based on the ALMA Tunable Filter Board. ... A. Russo, G. Comoretto: Spettrometri a correlazione e a FFT per il radiotelescopio SRT , Arcetri technical report 1/2005 . G. Comoretto, A. D'Ambrosi, R. Nesti, A. Russo, F. Palagi: A modular multichannel spectrometer - design study Arcetri technical report 4/2006 . ... G. Comoretto, G. Tuccari: Reference design for the Digital BBC Architecture Arcetri technical report 2/2008 ...

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• Programme - Cosmic Polarization Rotation Workshop, Septemeber 7-8, 2015
• Arcetri Solar Physics Group: Solar Polarimetry
• Linked Hardware Stuff

... Left: A POSSM plot of the uncalibrated spectrum of DA 193 at 1.66 GHz on a baseline Bear Lakes to Noto. ... The phase slope as a function of frequency is clear evidence for a small delay error in the correlator model. Right: The same data as shown on the left, but corrected for a delay error and a residual fringe rate. ... Left: A VPLOT plot of the uncalibrated amplitude (upper frame) and uncalibrated phase (lower frame) as a function of time for the source DA 193 on a baseline HartRAO to Noto. ...

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Communications For Your Astronomy Event . Articles | ... The FCC agreed and in 1996 created the Family Radio Service (FRS) as one of the Citizens Band Radio Services. ... You are provided authority to operate a FRS unit in places where the FCC regulates radio communications as long as you use only an unmodified FCC certified FRS unit. ... Frequencies Used 462.5625-467.7125 MHz . FRS Channel Plan . ... 0.5 Watts . ... www.astronomy.net . ... dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• Polar Align Your Telescope, Here's How. - an Astronomy Net Article
• Polar Alignment Using The Star Drift Method - an Astronomy Net Article
• Hunt For Aliens On National Geographic Channel - an Astronomy Net UFO Forum

... Basic Research results General information Main characteristics of the Radio telescope Observing programs General view of the antenna array Main research areas Principle of generation of radio images Radio telescope's beam Receiving systems Main characteristics of the base receiving-recording complex Calibrations Data archive and databases Publication of data Possibilities of observing the structure and dynamics of microwave activity SSRT - Research results . ...

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... It has to do with tweaking the HSV channels of an image. ... HSV is a color model that defines colors based on their Hue, Saturation and value. ... Value . ... White values in this channel have the maximum brightness, black values have no brightness at all. ... Note that the Saturation is at the maximum values (giving the purest colors) and the Value is at the maximum values as well (giving the brightest colors). ... Hue, Saturation, and Value, this time with the Value set to half the maximum value....

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• Sternberg Astronomical Institute
• APOD: 2003 February 5 - Unusual Gullies and Channels on Mars
• APOD: 2006 May 29 - The NASA Television Channel

... The top panel shows Stokes I (black solid line, in arbitrary units, and not corrected for the instrument response), P V (red solid line centred about 0), and the null profile (blue solid line, offset by -0.75 % for display purpose). ... The slope of the red interpolating lines in the bottom panels gives the mean longitudinal field from P V (left panel)and from the null profile (right panel, the latter being expected zero), both calculated using the H Balmer lines only. ...

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• sfit help file
• Spectru