The success of any ALMA phase-calibration strategy, which incorporates phase transfer, depends on a good understanding of how the atmospheric path delay changes with frequency (e.g. Holdaway Pardo 2001). ... We find the wet dispersive path delay becomes a significant fraction ( 5 per cent) of the non-dispersive delay for the high-frequency ALMA bands ( 160 GHz, Bands 5 to 10). ... The full text of the memo is available here . ... Dispersive path delay . 2009 Emily Curtis ...

... Electrode polarization measurements . ... Processing of ceramic materials, electrode systems and electrochemical cells . ... The technique is based on the measurements of a sample length variations with temperature or isothermal changes of the atmosphere, imploying the Linseis L75 vertical dilatometer. ... The gas system is equipped with a programmable gas-box, electrochemical oxygen pump and a sensor enabling to ajust and to continuously control the oxygen partial pressure in the range 10-21 - 1...

... Because of the low conductivity, the magnetic coupling is weak and depends critically on density, temperature, ionisation rate and charged species. ... Implications When the Hall regime dominates near the midplane and ambipolar diffusion is dominant closer to the surface, a thicker layer of the disc is unstable to MRI perturbations and modes grow faster than under the ambipolar diffusion approximation. ... Right panel: For weak coupling, Hall limit perturbations grow until vA/cs ~ 2.9. ...

TEMPERATURE OF REGOLITH IN COLD TRAPS ON THE MOON A.A. Berezhnoi Sternberg Astronomical Institute Moscow, Russia The hypothesis of the existence of the lunar ice in cold traps was stated in (Watson et al., ... Arnold, 1979) estimated the mean temperature on the surface of lunar cold traps as 40-90 K. We plotted the dependence of regolith mean temperature on depth for these two values of mean temperature on the surface (see figure 1). ... Arnold J.R. Ice in the lunar polar regions, J. Geophys. ...

. Located in the focal plane of the telescope, PlanckтАЩs Low Frequency Instrument (LFI), and the High Frequency Instrument (HFI), are equipped with a total of 74 detectors covering nine frequency channels. These detectors must be cooled to temperatures around or below 20 Kelvin so that their heat does not swamp the faint microwave signals they are designed to detect. Credit: ESA/AOES Medialab)

... Calibration and sensitivity measurements for tests of microwave radiometers. ... The instrument consists of two waveguide matched loads operating at ambient temperature and two matched loads, cooled at variable temperatures. The temperatures are microprocessor-controlled. The test version of instrument is available. ... Dimensions                                          450 350 550 mm . ... Output temperature                                            100–350 й . ...

Next: Polarization efficiency: size/shape/orientation effects Up: Optical properties of cosmic Previous: The 2175? feature . To model the interstellar polarization one needs to calculate the forward-transmitted radiation for an ensemble of non-spherical aligned dust grains. ... Let non-polarized stellar radiation passes through a dusty cloud with a homogeneous magnetic field. ... The angle between the line of sight and the magnetic field is ( ). ... where the angle is connected with and ( ). ...

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. ...

... Я попытался выделить самые интересные сюжеты, в основном связанные с наблюдательной астрономией и появившиеся в Архиве препринтов в 2006 г. Большинство из этих работ описывались в моих обзорах и было включено в число "лучших из лучших" . ... Непопадание в список каких-то важных работ связано в основном с тем, что "на лету" трудно определить важность статьи вне своей области интересов, кроме того этот год выдался для меня непростым.. ... Authors: Jason W.T. Hessels et al. Статья в Обзорах . ...

... Design of Imaging Optics . Analyzing Optics . ... The high resolution near infrared camera (CONICA) for the first VLT unit telescope is under development. It serves as a multi-mode instrument for the wavelength region between 1.0 and 5.0 microns, providing diffraction-limited spatial resolution when combined with the adaptive optic system NAOS of the VLT (Rosset et al. ... VLT instrumentation, ALADDIN InSb detector, NIR imaging, NIR spectroscopy, re-imaging optics, IR optics . ...

... 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 . ...

Variations of total ozone content and lower ozone stratosphere temperature in Antarctic Region during winter-spring period A.V. Grytsai National Taras Shevchenko University of Kyiv Astronomy and Space Physics Department assen@univ.kiev.ua Data, used in the work work Total ozone: Total Ozone Mapping Spectrometer (TOMS) measurements during 1979 - 2005 and Ozone Monitoring Instrument (OMI) ones for 2006, for http://toms.gsfc.nasa.gov/ftpdata.html. ... A long-term TOC decrease is significant. ...

... GRIN lenses for telecommunication optics applications ? GTC (gradient telecom) lenses. ... GTC lenses are used in different fiber-optic devices: collimators, couplers, isolators and WDM etc . ... 2.Diameter . GTC lenses diameters are 1.0 mm, 1.8 mm, 3.0 mm and 4.0mm. ... 1.0 mm -3.0 mm diam GTC lenses are supplied in 0.22P, 0.23P, 0.25P, 0.27P and 0.29P length. 4.0 mm diam GTC lenses are supplied in 0.11P length. ... GTC . ... 3 scratches with 5mkm max width and 200mkm max length are allowed . ...