Multiplexed RF Multiplexed RF-SET Readout Amplifiers for Superconducting Detector Arrays T homas Stevenson, Orbital NASA /GSFC, Code 553, Greenbelt, MD 20771 Fernando Pellerano, NASA /GSFC, Code 555, Greenbelt, MD 20771 Carl Stahle, NASA /GSFC, Code 553, Greenbelt, MD 20771 Robert Schoelkopf, Ken Segall, Applied Physics, Yale University, PO Box 208284, New Haven, CT ... LITHOGRAPHIC TANKS: We have made progress in miniaturizing tank circuits to allow larger arrays of multiplexed RF-SETs. ...

... 2013 February 12 . Reflected Aurora Over Alaska . ... Explanation: Some auroras can only be seen with a camera. ... In the above image , the green aurora were easily visible to the eye, but the red aurora only became apparent after a 20-second camera exposure. ... When photographing an already picturesque scene near Anchorage , Alaska , USA , last autumn, a camera caught both the visual green and subvisual red aurora reflected in a lily pad-covered lake. ... About APOD | ...

... Credit Copyright: Todd Salat ( AuroraHunter ); Sky Annotation: Judy Schmidt Explanation: Some auroras can only be seen with a camera. ... In the above image , the green aurora were easily visible to the eye, but the red aurora only became apparent after a 20-second camera exposure. ... When photographing an already picturesque scene near Anchorage , Alaska , USA , last autumn, a camera caught both the visual green and subvisual red aurora reflected in a lily pad-covered lake. ... September s Aurora ...

... The upward propagating HF wave is reflected at a particular height. ... The instabilities seen by the radar shortly after the HF is turned on can be divided into two types according to the degree of sophistication required in the model describing the response to the E field of the HF wave. ... The first kind occurs at a particular height determined by k vector and frequency matching conditions on the HF wave, the low and high frequency plasma waves, and the radar EM wave. ... Incoherent Scatter . ...

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... SS433 is a close binary system, one star is a supergiant, a second one is a black hole. ... Even a black hole cannot accept such an enormous mass flux, a supercritical accretion disk appears, all the excess gas glows up to several tens of thousands degrees and is ejected off the disk with enormous velocities. ... SAO researchers have found an evidence of the supercritical accretion onto a black hole in SS433, which follows from a brightness variability of the SS433 disk. ...

... Activities | ... Collaborations | ... The main objective of laboratory #235 is development of imaging array detectors for different applications (including radio-astronomy, safety and security systems). We develop ultra-sensitive detectors (bolometers) and detector arrays, planar antennas and tuning circuits, refractive and reflective quasi-optical systems focusing millimeter and sub-millimeter wave irradiation on the detectors. ...

... Цвет: синий . ... Олимпийка Nike. ... JBL Synchros Reflect BT Sport Красный Красный.. ... Цвет: белый . ... Цвет: зеленый . ... Стелька: Натуральная кожа . ... Кружка WIing Star "Завтрак", цвет: белый, 460 мл - WING STAR - WING STAR . ... Держатель для бильярдного мела QK-S "X3", магнитный, кожаный, цвет: черный - QK-S - QK-S . ... Щетка для мытья посуды "Альтернатива", мягкая, цвет: голубой, белый, 22 см - Альтернатива - Альтернатива . ...

Next: Amplitude Distribution Previous: Gravitational Wave Background from . To get rid of the extragalactic GWB produced by binaries, one can use the above considerations to find the optimal detector halfwidth and frequency for observations. ... for the flat red end of the GWB, and . ... Equating to unity, one finds the critical detector halfwidth . ... In contrast, by observing the sky with a GW detector with a narrow enough halfwidth , one will not ``see'' the extragalactic GWB at frequencies . ...

... IONOSPHERIC DATA IN THE INTERACTIVE SPIDR SYSTEM . ... The Ionosphere The ionosphere is that part of the upper atmosphere where free electrons occur in sufficient density to have an appreciable influence on the propagation of radio frequency electromagnetic waves. ... These regions may be further divided into several regularly occurring layers, such as F1 or F2. ... E Region: The region between about 95 and 150km above the Earth that marks the height of the regular daytime E layer. ...

Next: The Next Step for the FUSE Calibration Pipeline . Up: Data Management and Pipelines . ... CalFUSE is the data-reduction software pipeline used at the Johns Hopkins University to process data from the Far Ultraviolet Spectroscopic Explorer (FUSE) . ... We present improvements included in v2.2 of the pipeline and announce the availability of calibrated spectral files processed with CalFUSE v2.2 from the Multimission Archive at STScI (MAST). ... Figure 1: An event burst on the LiF 1 detector. ...

... Bad Astronomy . ... Mad Science . ... The color of light is determined by the wavelength: the long wavelengths make red light, somewhat shorter makes yellow, shorter even than that makes blue. ... The red light gets reflected by the shirt and into your eye. ... A perfect mirror does actually reflect all light hitting it. ... A mirror, on the other hand, reflects the blue and red light in the same direction, and so the mirror actually builds an image of the source of the light. ... 2008 Phil Plait. ...

... Tonight's Sky . ... Observing . ... Sky this Month . ... Star Atlas . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... The Golden Earring, planetary nebula NGC 2867, and barred spiral galaxy NGC 3109 . ... Astronomy for Kids . ... Reflected glory in nebula M78 . ... Only registered members of Astronomy.com are allowed to comment on this article. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

... Telescopes ћ Binoculars ћ Microscopes . Meade Ultra-High Transmission coatings (UHTC ) Group . ... Meade Standard Coatings: The optical surfaces of all Meade telescopes include high-grade optical coatings fully consistent in quality with the precision of the optical surfaces themselves. ... These specialized, and extremely advantageous, coatings are offered here as the Meade Ultra-High Transmission Coatings (UHTC) group, a coatings group available optionally on many Meade telescope models. ...

The optical scheme of the instrument is sketched in Figure 1 , it is designed to match the F/20 focal ratio of the TIRGO telescope. We have, following the optical path, the window of the dewar, the order sorting filter (not in figure), a field lens, in Calcium Floride, and the slit, in the focal plane of the telescope. ... The resolving power is (for first order of grating) of about 600 in the center of J band and 950 in the center of the K band, using a slit of two pixel (3.46 arcsec). ...

. Общая Астрономическая Конференция > Товары для астрономов > Полезное для астрономии > Reflecting Telescope Optics II? . PDA . Просмотр полной версии : Reflecting Telescope Optics II? . DK . 08.02.2008, 16:01 . Есть у кого-нибудь? Первая часть вроде здесь появлялась. Дмитрий . vBulletin v3.8.4, Copyright 2000-2016, Jelsoft Enterprises Ltd. Перевод: zCarot

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... This shows the Sun, Moon and Earth (not to scale) together with the . ... They have tested the technique on the Earthshine, the light reflected from the Earth by the Moon, and showed that it can reveal the presence of life in our planet. ... This technique uses the fact that the light reflected from the planet is polarised, whereas that emitted by the star is not. ... Polarised light can tell us about the reflecting surface...

Feed cabin Nr. 6 . ... The special feed cabin Nr. 6 is intended for observation of near-zenith sky region with using of whole RATAN-600 reflecting surface. Both highest possible collected area and the best angular resolution of radio telescope in this operating mode are realized. ... 3.75 GHz . ... Physical temperature . ... System noise temperature . ... Antenna noise temperature . ... The effective area of the whole RATAN-600 ring antenna . ... a reference horn . ... Feed Horn . ...

... COMPUTER SIMULATION OF RADIOWAVE MULTIPLE SCATTERING EFFECTS IN IONOSPHERE USING MONTE-CARLO METHOD . ... Distribution of reflected radiation on the ground is computed. ... Such influence can be remarkable if the scattering is multiple, i.e. the optical thickness for the scattering process is considerably greater than a unit. ... Radiation energy transfer in the slab is modeled by distribution of some particles carring small portions of radiation energy. ... The isotropic plasma approximation is...

If an object emits a total power (energy per unit time) L (L for luminosity), this radiation will spread outward into space, becoming more spread-out and diffuse as it goes. ... If an object receives more heat than it dissipates, then its temperature will rise. ... Any object at a temperature above absolute zero will radiate energy. ... A is the surface area of the black body, T is its temperature, and s = 5.67 « 10 -8 Wm -2 K -4 (the Stefan-Boltzmann constant). ...