Next: Future Work Up: CCD Scientific Performance Previous: Modes of Operation . ... However, the first experiments with Co-60 irradiation showed loss of charge transfer performance at doses of 10krads [Lumb and Holland 1988b]. ... These studies showed that the charge transfer degradation was a more severe problem than conventional integrated circuit damage mechanisms. ... Another manifestation of radiation damage is that of dark current spike generation. ...

... As of October 1, 2009, the global rate for the STIS NUV-MAMA dark current has still been occasionally reaching values as high as 13500 counts/s. This high dark current will force use of a signficantly smaller buffer time than would be otherwise needed, and in many cases may push the count rate high enough to make time-tag observations impractical. ... However, we instead found for the NUV MAMA detector an initial global dark rate of between 9000 and 18000 counts/s (a mean of 0.013 counts/s/pixel). ...

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 . ...

... Current projects MNRF1997 - 3/12mm systems Construction of the new Mopra MMIC-based 3/12mm receiver is proceeding, with installation scheduled in September. ... Good performance up to 115GHz is expected. The fabrication of a set of spare components for the ATCA and Mopra 3/12mm receivers will be completed by July. ... MNRF2001 - ATCA Broadband Upgrade (CABB) A design for the LO/conversion system in the antenna has been chosen and work towards the construction of a prototype is proceeding. ...

... CURRENT ASPECTS OF REMOTE SENSING OF EARTH FROM SPACE . ... For developing of the scientific concept and the programs of global monitoring of the Earth from space and pursuant to the disposal of Presidium of Russian Academy of Sciences # 10310-717 (August 11, 2004 ) Space Research Institute RAS and Center of Space Observations of the Russian Space Agency during November 16-18, 2004 conduct the Second Opened All-Russia conference ' Current Aspects of Remote ...

TEST RESULTS WITH 2KX2K MCT ARRAYS Finger, G, Dorn, R.J., Mehrgan, H., Meyer, M., Moorwood A.F.M. and Stegmeier, J. European Southern Observatory Abstract: The performance of both an LPE 2Kx2K engineering grade and a science grade array have been evaluated. Both arrays have a cut-off wavelength of c=2.6 µm. At an operating temperature of 60 K, the dark current of the science grade array is 0.004 e/s. The peak quantum efficiency of the science grade array is 84.4%. ...

... NOW HERE'S THE BEEF: The VSWR tolerance of a transmitter like ours depends on a number of potential problem areas, such as plate voltage swing, voltages and currents in the elements of the matching network and filter, voltage and current tolerance at nodes in the Heliax line, etc. ... The screen grid has a finite power dissipation limit (before it starts melting!), and this limit is given on the tube datasheet. Transmitter metering should show both screen voltage and screen current. ...

December 1, 1999 Prof. Burton Richter, Director Emeritus, SLAC . ... Physics Colloquium . Condensed Matter Seminars . Theoretical Science Seminars . ... The lecture will summarize some of the new information in high energy physics that impacts our understanding of the basic structure of matter and evolution of the early universe. ... Professor Richter's talk will be aimed at a general science audience. 4:00pm, 100 Willamette Hall . return to top . ... 4:00pm, 318 Willamette Hall . ...

... 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. ...

... There are still a few items on a punch list of things to be completed. ... Sometimes recovery is quick and other times the instrument self corrects itself just by sitting idle. ... As of August 30, 2013, the 3.5-m has implemented a TAI time standard in all the instrument headers. ... ARCES . ... 2015-11-30: The slitviewer computer problems appear to be intermittent but are quickly resolved by the observing specialist. ... The instrument is available again . ... 2015-10-26: Vacuum not soft. ...

THE RELATIVE MONTHLY MEAN SUNSPOT NUMBER ON DECEMBER 2013 HAS MADE Wdec.= 61.4, THAT GIVES FOR 42 MONTH (2012, JUNE) DEVELOPMENT CURRENT 24 CYCLES OF SOLAR ACTIVITY THE SMOOTHED MONTHLY MEAN SUNSPOT NUMBER W*june= 61.7 THE BEGINNING 24 CYCLES OF SOLAR ACTIVITY - I 2009 with W*=1.8 THE MOST PROBABLE TIME OF THE MAXIMUM OF THE CURRENT CYCLE- XI.2012 - III 2013 THE MOST PROBABLE HEIGHT OF THE MAXIMUM - Wmax = 66 - 75. ... NEXT WEEK THE LEVEL OF SUNSPOT ACTIVITY IS EXPECTED TO BE THE HIGH AND AVERAGE. ...

... Astrophysics Group . ... COAST . COAST Current Status . ... COAST File Archive . ... Fringes and Power Spectra from COAST . ... The first stellar fringes were obtained in June 1991. ... We obtained sufficient data to reconstruct the first infrared image from an aperture synthesis array. ... The North telescope of the COAST array was moved to a new foundation, further to the North, making the longest baseline 67 metres. ... A fifth telescope was sited on the Southwest arm of the COAST array. ...

Novermber 2008 - WORK IN PROGRESS We are currently using the (just announced end-of-life) Netrestore software to install our systems. ... We automount our NFS-based home directories. ... On the Mac end, edit /etc/autofs.conf, and add ",resvport" to the AUTOMOUNTD_MNTOPTS. ... This is more of a problem, because Finder is a busybody, sticking it's nose in business it shouldn't. Simply symlinking to an autmounted directory failed abysmally. ... Here's our current list of files we change, and why: . ...

... POLAR/VIS EC . ... Kiruna Magnetometer . ... HLMS VHF Auroral Radar . Active aurora should produce a bright ring around the magnetic pole in the POLAR image (note: the UVI field-of-view is smaller than the planetary disk.) ... Auroral activity near Kiruna, Sweden will produce deflections on the magnetometer trace -- significant activity gets up to several hundred nT of deflection. ... The VIS is one of twelve instruments on the Polar satellite of the NASA Goddard Space Flight Center. ...

LIF Marseille and Institute for Information Transmission Problems, Moscow, Russia. E-mail: alexander.shen AT lif.univ-mrs.fr, sasha.shen AT gmail.com . ... Kolmogorov complexity, algorithmic information theory . Teaching (mathematics, computer science): Independent University of Moscow, Moscow State University, Moscow mathematical school No 57. ... Kolmogorov memorial conference, Moscow. IEEE Conference on Computational Complexity, Aarhus (Denmark), ("Kolmogorov day") . ...

... This file is intended to provide a basic functional overview of the EISA Bus, so that hobbyists and amateurs can design their own EISA compatible cards. ... EISA is upwardly compatible, which means that cards originally designed for the 8 bit IBM bus (often referred to as the XT bus) and cards designed for the 16 bit bus (referred to as the AT bus, and also as the ISA bus), will work in an EISA slot. ... This is used by the slave device to inform the bus master that it is capable of 16 bit transfers...

... Jelly Donut Shaped Rock Appears on Mars . ... Credit Copyright: Mars Exploration Rover Mission , Cornell , JPL , NASA Explanation: What if a rock that looked like a jelly donut suddenly appeared on Mars? ... The unexpectedly placed rock, pictured above , was imaged recently by Opportunity after not appearing in other images taken as recently as twelve Martian days ( sols ) before. ... Publications with keywords: Mars . Publications with words: Mars . ... Opportunity s Decade on Mars . ...

... We describe a systematic, regular testing program for CCDs which is now being applied at La Silla. ... The test are integrated in the CCD reduction package of the Munich Image Data Analysis System (ESO-MIDAS). ... To that end, we have instigated a systematic program of standard CCD tests at ESO, La Silla. ... The test program has been integrated in the CCD reduction package of the Munich Data Analysis System (ESO-MIDAS) (ESO 1993), and will be available in the 94NOV release. ...

... 2014 January 29 . Jelly Donut Shaped Rock Appears on Mars . Image Credit: Mars Exploration Rover Mission , Cornell , JPL , NASA . Explanation: What if a rock that looked like a jelly donut suddenly appeared on Mars? ... Even so, the rock's unusual light tones surrounding a red interior created interest in its composition -- as well as causing it to be nicknamed Jelly Donut . ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ... A service of: ASD at NASA / GSFC . ...

... Integrated superconducting submm receivers and spectrometers. ... Development, study and optimization of the superconducting phase locked Local Oscillator for integrated spectrometer. ... Superconducting Integrated Submm Spectrometer for Laboratory Applications. ... Development, study and optimization of the superconducting phase locked Local Oscillator . ... The objective is to develop and study a superconducting Local Oscillator (LO) for an integrated submm spectrometer . ...