The main reflector surface was measured and then adjusted in jan01. ... cband cals measured jan01 using sky and absorber ) . ... The cband frequencies used were 4500, 4860, 5000, and 5400 Mhz. 8 sources were tracked (although only 2 or 3 were complete tracks) and the gain, SEFD, and pointing errors were computed. ... When the cband cals were measured in jan01 there was a discrepancy in the cal values computed using the absorber or the sky for frequencies greater than 5000 Mhz. ...

... T emperature dependence of surface impedance of Tl 2 Ba 2 CaCuO 8- d and YBa 2 Cu 3 O 6.95 single crystals measured in the microwave band. Abstract: . The real part R s and the imaginary part X s of the surface impedance Z s =R s +iX s of Tl 2 Ba 2 CaCuO 8- d and YBa 2 Cu 3 O 6.95 single crystals have been measured with high precision at frequency w/2p= 9.4 GHz in the temperature range 0< T< 140 K. In the Tl 2 Ba 2 CaCuO 8- d . ... A formula describing the curve of . ...

Microsymposium 34, MS058, 2001 ANOMALIES OF THE MOON'S THERMAL EMISSION IN THE IR SPECTRAL RANGE (10.5 - 12.5 micron). ... Sternberg State Astronomical Institute, Moscow, 119899, Russia, pugach@sai.msu.ru Summary: New satellite measurements of the lunar-surface radiation temperature were used to construct the spatial angular function of thermal radiation of the Moon in the infrared (10.5-12.5 micron) spectral range. ... These thermal anomalies are observed only in the limited range of phase angles. ...

... Luminosity (L) · · · · A source's luminosity is the power that it emits in radiation. ... NB Astronomers often say `flux' when they mean `flux density' · SI units are Wm-2Hz -1 -26 filter · Also used are Jy 10 Wm-2Hz -1 E= РРРF d dA dt Specific Intensity, Surface Brightness (I) · Specific intensity (or surface brightness) is the power received (or emitted) per unit area per unit frequency per unit solid angle. ч F at surface of a spherical source = I · · Specific intensity is independent of distance...

... A three-cell test section roughly representative of the primary mirror was provided for this test by the Steward Mirror Lab. ... Additionally, the tests are intended to determine relative airflow vs. pressure drop characteristics for each of the air flow patterns so the results can be evaluated both as a function of flow rate and of pressure drop along the flow path. ... The bottom (top as installed) was cut out so it could close the chamber for heating and be removed for the cooling tests. ...

... It can · · obtain ice sample from 20 cm or deeper surface layer, then melt it and extract biomass from the ice surface water by filtration; Laser TOF MS for the measurements of element composition of the biomass; Gas TOF MS for the detection of: 1) volatile components, generated at the heating of biomass sample (closed window mode); 2) secondary ions , emitted from ice matrix by the influence of energetic magnetosphere ... Spectrum of yeast sample. ... Laser TOF MS 6. ...

... VOLUME**, **PUBLICATION YEAR** **EDITORS** Time-resolved spectral analysis of the pulsating helium star V652 Her C.S. Je ery, V.M.Woolf Armagh Observatory, College Hill, Armagh BT61 9DG, N. Ireland D.L.Pollacco School of Physical Sciences, Queen's University Belfast, Belfast BT7 9NN, N. Ireland Abstract. We present a summary of a new time-dependent spectro- scopic analysis of the pulsating helium star V652 Her. ... The rst direct evidence of a supersonic shock at minimum radius is also obtained. ...

... If the measuring aperture varies, a varying amount of starlight will be excluded. Furthermore, the excluded fraction is wavelength-dependent; so the transformation from instrumental to standard system changes. ... Unfortunately, sometimes it is necessary to combine measurements made with different field stops. Observers should realize that this really means different instruments; the differences are usually several per cent. ... Usually, the actual aperture sizes are only approximately known. ...

This page provides explanatory text for the dials shown on the Rice Current Solar Wind Conditions and Current Solar Wind Conditions (Dials Only) webpage. These dials use the last good received set of measurements from the Real Time Solar Wind package on the Advanced Composition Explorer (ACE) spacecraft. ... Measured) This quantity is the number of solar wind protons per unit volume as measured by the ACE Solar Wind Electron Proton Alpha Monitor (SWEPAM) . ... It is measured by ACE/SWEPAM. ...

... One Jansky (Jy) is defined as 10 -26 Wm -2 Hz -1 , so it is a unit of measurement of the spectral flux density, F . ... 3x10 -12 . ... erg sec -1 cm -2 ?m -1 . ... where m is the magnitude and F o the zero-point flux for the given photometric band. ... Surface brightnesses are generally measured in Janskys arcsec -2 , MJy steradian -1 or magnitudes arcsec -2 . If you have a surface brightness S in MJy steradian -1 , then you can use: S [Jy arcsec -2 ] = S [MJy ster -1 ] x 0.084616. ...

... Do other stars have planets too? Humanity took one step closer to answering these questions in October 1995 when it was announced that the star 51 Pegasi harbors at least one planet. ... In the center of the above photograph lies a star with one of the hottest surface temperatures yet confirmed. ... Too Close to a Black Hole . ... Enceladus orbits Saturn between the smaller Mimas and the larger Tethys. ... Saturn's Moon Tethys . ... The Crab Nebula resulted from a star that exploded - a supernova. ...

In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

... 2013 July 31 . 130 Years of Earth Surface Temperatures . Image Credit: GISS , NASA . Explanation: How has the surface temperature of Earth been changing? ... On average, the display demonstrates that the temperature on Earth has increased by nearly one degree Celsius over the past 130 years, and many of the warmest years on record have occurred only recently. ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . NASA Web Privacy Policy and Important Notices . ...

INFRARED FOURIER-SPECTROMETER SICH-F . ... Instrument work regimes: 1) Inside. 2) Calibration at inside standard sources 2 - 4 times per a rotation. 3) Calibration at "free space" 2 - 4 times per a rotation. 4) Infrared radiation measuring 10 - 40 min. per a rotation. ... Spectrometer consists of the photodetector block and the block of signal processing and control. ... Diagnostic information and attach data will transfer by state telemetric channels. ... Detector temperature. ...

... GSAOI Home . ... Science . ... It is widely accepted that the evolution of the large scale structure of the Universe is driven by dark matter. Understanding this dark matter continues to be one of Astronomy's great unsolved problems. Measuring the bulk motions of galaxies allows us to map the overall mass distribution of the Universe in a way that is independent of the luminous matter in galaxies. ...

. (a) . (b) . (c) Fig 10. Topography of the North (a) and South (b) sector panels before and after correction. RMS surface error is 1.2 mm and 0.18mm correspondingly. Repeatability of successively measured maps is 0.06 mm.( V.Khaikin,S.Golosova, F.Danilevich et al. XX ESTEC Antenna Workshop, June 1997 ). (c) Histogram of surface errors of RATAN-600 South sector panels after surface reconstruction.

The problem of measuring the surface accuracy of a large reflector antenna is not simple. ... Using the Fourier relationship connecting the shape (and phase) of the radiation pattern and the antenna illumination function, a measurement of the former can be used to infer the latter. ... We have performed three set of measures on the CNR-IRA 32-m radio telescope (image) . 1988: Measurements using Misell phase retrieval algorithm, and the 22 GHz Orion water vapor maser as a reference source. ...

The antenna element Ravi ATNF, Narrabri 1. ... Miriad works out the radio Parabolic reflector: A parabolic reflector adds all the fields from a surface = aperture at a focal point. ... Feeds are `compact' and `corrugated' horns The inner profile is curved The inner surface has grooves Cross-section of a horn Sub-reflector 28 main-reflector Feed horn O `optical axis' The feed horn adds all the rays that come from the 28 deg. wide sub-reflector. The feed down-weights rays that come off-axis. ...

... Conference abstracts (PDF, 92k) . 09:30-10:30 . ... Translation flows on Z d covers of compact translation surfaces . ... Coffee . ... Volume entropy for surface groups . ... Ergodicity of infinite translation surfaces . ... Stationary measures on homogeneous spaces . ... Dynamics of SL (2, R ) on Prym eigenforms . ... Symbolic dynamics of a traffic map . ... Ergodic flows and some problems in analysis . ... Connected components of the strata of the moduli space of meromorphic differentials . ...

... The computer control systems and the data analysis software tools are being developed simultaneously and are used with the mock-up hardware to simulate the data acquisition process. ... Software which handles the commissioning tasks, engineering analysis, and data processing are being developed in the AIPS++ system. ... Here we give some examples of the software being developed and we show some of the tools available in the AIPS++ programming and analysis environment. ...