WFC3 Instrument Handbook for Cycle 24 . ... Wide Field Camera 3 Instrument Handbook for Cycle 24 > Appendix A: WFC3 Filter Throughputs > A.2 Throughputs and S/N Ratio Data . ... Note that the plots show the S/N as a function of source magnitude for exposure times as short as 0.1 s, although the minimum exposure time for the UVIS channel is actually 0.5 s. Wide Field Camera 3 Instrument Handbook for Cycle 24 > Appendix A: WFC3 Filter Throughputs > A.2 Throughputs and S/N Ratio Data . ...

... Anticipated Radiation Effects . ... Various radiation effects can be anticipated, based on similarities to other CMOS devices. ... Total dose radiation effects in CMOS devices can be divided into two broad classes: charge trapping and interface state generation. ... When interface states are located in a depletion region, they act as sources of dark current. Increased dark current is expected to be the dominant radiation effect in active pixel sensors, leading to increased shot noise. ...

... 05apr08- System Temperature/powerLevels (bsisk) . ... 05apr08- Fiber Span AC231, Fiber Optic Xmtr/Rcvr measurements by bsisk . Eddies down conversion box takes the output of the alfa filter bank, amplifies, downconverts, filters, amplifies, and then sends the IF signal down the fiber. ... GAIN . ... RF amp . ... The damage threshold for these devices is an input power of +20 dBm. ... 27Dbm at input to RF amp will cause 1 db compression at mixer output (assuming 20 db gain for misbiased RF amp). ...

... LO frequencies were 1/2, 1/3 and 1/8 of signal frequency 75 GHz. ... But single junction SIS mixer has 30 dB input signal power range only [ll and it may decrease at high frequencies more than 200 GHz due to Josephson and 1 "switching" noise rise [2 e Our experiments show that subhurmonically pumped SIS mixer may have improved saturation power and reduced noise at high frequencies in some operation modes. ... 269 Fig.2 Quantum for LO and signal frequencies SIS operating mode. ...

... Galaxies 99 Cosmic background with model of cloudy interstellar medium Yu. ... Figure 1: Averaged spectrum of the cosmic background I f in frequency range 0.25 200 MHz for the Galactic poles. ... First interpretation of the cosmic noise background spectrum at broad band frequency range 0.25 200 MHz with a model of the cloudy interstellar medium ISM is presented here. ... Synthesized background spectra I f for regions of the Galactic poles at the frequency range 0.25 200 MHz is presented in Fig. ...

... It has been largely superceded by MatWeb . Conversion Factors . Material properties . Physical constants . Astronomical constants . This table gives conversion factors to convert various units to their SI equivalents. ... The units are SI. This is a short list of physical constants in SI units. ... Boltzmann constant . ... Gas constant . ... Mass . ... Plank's . ... Radiation constant . ... This is a short list of astronomical constants in SI units. ... Sun . ...

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. ...

Next: CCD Scientific Performance Up: CCD Operation Previous: CCD Operation . A visible light photon releases only one electron-hole pair, and consequently many photons must be collected in each pixel for a measurable signal to be produced. ... This use as an imaging X-ray spectrometer requires that no more than one photon is incident on each pixel in any image frame, which imposes a requirement that image collection times be limited to ~seconds for typical astronomical applications. ...

ASKAP Industry briefing Russell Gough October 23, 2009 Outline · Introduction · ASKAP specifications · Analog System specifications · Design constraints · ASKAP prototype PAF receiver system · Design Options · Solution · Key challenges and future directions · Mass production and testing of receiver packages · Component cooling · Integrated receivers (`system-on-a-chip') CSIRO. ... ASKAP Industry briefing - October 23, 2009 Slide 10 ASKAP Analog System architecture with 200 receiver elements CSIRO. ...

Next: C.S. Jeffery, Research Astronomer Up: Research Previous: J.E. Chambers, Research Astronomer Contents . ... We examine spectral time-series of two lower-chromospheric lines observed with SUMER/SOHO (N I and C II ). ... Two examples of explosive events observed with SUMER/SOHO in transition region spectral lines are reported here; one detected in C IV 1548?, in a region within the northern polar coronal hole, and the other in O VI 1032?, in an active region. ...

Композиты и наноструктуры COMPOSITES and NANOSTRUCTURES ?1 2010 CONTENS A.A. Kolchin, V.M. Kiiko, A.N. Tolstun, T.M. Ul'yanova, S.T. Mileiko Oxide/oxide composites with single crystalline fibres: high temperature creep .. ... L.M.Manocha,* Bharat Patel and S. Manocha Sic Fibers and composites by chemical vapor reaction (CVR) of host carbon materials .. ... SiC fibers made from isotropic carbon fibers have no crack and percentage SiC conversion is better than that from PAN based carbon fibers. ...

... The procedure of radiometer signal integration can be considered as a sort of reducing dimension of the initial sampling space, where the samples are the result of analog-to-digital conversion. ... The probability distribution of the signal and spikes is completely known. ... The quality of the considered algorithm could be also illustrated by Figure 2 . ... One could see the considered adaptive algorithm is preferable even by low degree of compression, because all spikes have been depressed. ...

... 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...

... The International Conference "Mode Conversion, Coherent Structures and Turbulence" will be held in the Space Research Institute of RAS during the period from 23 up to 25 November 2009. ... The international conference MSS-09 is organized by Space Research Institute with participation of the Russian Academy of Sciences, the Dynasty Foundation, the Russian foundation of fundamental researches, the European Geosciences Union, the Education and the Scientific Council on Nonlinear Dynamics of RAS. ...

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. ...

Fasti is an innovative design for infrared detector control. ... to use largely accepted standards as boundaries, as a PCI bus, a parallel interface or a serial, and to use few of them . ... The building blocks of Fasti are: . ... the serial bus for controlling housekeeping devices (temperature and pressure sensors or motor controllers) and programming data acquisition . ... Though not so fast, and lacking some forms of data integrity check, this bus is so widely used to be nearly unavoidable. ...

This test was is performed to investigate the feasibility of CMOS amplifiers (TLC 27481) at cryogenic temperatures for use with InSb FPA's. The advantage of cryogenic amplifiers is the possibility to place them close to the FPA. The video signal is amplified directly at the detector. ... If the cryogenic amplifier is switched on the temperature of the detector board is increased from 100 K to 125 K (third curve from bottom in figure 1 ). ... Third curve from bottom: temperature of detector board. ...

... With forseeable saturation of scaling CMOS devices the electron spin att racts much attention as a complement or even a replacement of the electron charge in digital information processing. ... Because of these properties the electron spin lifetime in silicon is long, which makes silicon perfectly suited for spin-driven applications. ... It is straightforward to apply the same techniques to obtain a spin lifetime above 1ns making silicon films and fins perfect spin interconnects. ... Wien - New York...

... Collective processes in plasmas with wave barriers . ... Нелинейное резонансное поглощение БМЗ-волны в поперечно-неоднородной плазме . ... Electromagnetic mode conversion by ultra-fast ionization of gases and condensed matter . ... A kinetic description of surface wave sustained discharge accounting for the nonlocal and collisionless electron dynamics . ... Ionization-induced langmuir wave excitation and spectrum conversion in high intensity laser pulses . ...

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 ( ). ...