A 2GHz Digital Filterbank Correlator Dick Ferris, CSIRO ATNF, John Bunton, CSIRO Telecommunications & Industrial Physics, & Bruno Stuber, Fachhochschule Solothurn Nordwestschweiz Abstract The combination of traditional polyphase filter architecture with a new multiplier-rich FPGA family provides the means to build wideband (GHz), flexible and high dynamic range filterbanks and FX correlators using a small number of commodity ICs. ... This is exactly the bottom channel of the DFT.) ...

ACS Insturment Handbook for Cycle 24 . ... Advanced Camera for Surveys Instrument Handbook for Cycle 24 > Chapter 5: Imaging > 5.4 High-Resolution Optical and UV Imaging . ... 5.4.1 Filter Set . ... 5.4.3 Red Leaks . Information regarding the HRC is provided for archival purposes only. ... HRC provided high throughput at blue wavelengths and better PSF sampling than either the WFC or other CCD cameras on HST . ... HRC?s CCD scattered red light into a wide-angle halo (as does STIS?s CCD). ... HRC . ...

... 12.07.07 Nando - Test the magnitude of aperture corrections to Landoldt Apertures. ... 12.07.07 Palle - Write up some suggestions for tests to verify which FORS/UT combinations really have rotating features. Original text: Sabine's flatfield versus rotators angle look promising, but more tests should be done which do not depend on the structure looking like a finger. ... The halves could be either ordered by rot-angle (e.g. 0-180 together, 180-360 together), or totally random. ...

... Single pixel observing with the mock spectrometer supports up to 7 independent frequency bands. Each band can supply: summed pols (1spectra) , polA,B (2 spectra), or full stokes (4 spectra) with 16 to 8192 channels per spectra. 12 bit A/D samplers running in complex sampling mode provide a maximum bandwidth for each spectra of 172.032 MHz. ... Single pixel observing only uses sp1 (the high band) from each of the 7 mock boxes. ... Single pixel specs for the mock spectrometer . ... MHz . ... 68.8 . ...

... Next: Star Finding and Up: Image Restoration and Previous: Multiresolution and Astronomical . ... Design improvements continue to be made in the filter developed using mathematical morphology principles for the Infrared Astronomical Satellite ( IRAS ) images. The purpose of this filter is to eliminate Galactic cirrus emission from extragalactic fields. ... With an appropriate normalization, the filter curve was applied to each pixel in the image to remove the Galactic cirrus. ...

. ( < 10nm) . NAME CENTER(nm) FWHM(nm) TMAX(%) DIMENSIONS(mm) TRACES DATA . H-alpha 655.2 9.09 67.56 50x50x5 (1) (2) trace data . Hodge on/off H-alpha . (Not on-site at APO, but can be obtained on loan--contact Paul Hodge at UWash, hodge/astro.washington.edu) . UW-WSU Nebular Emission-Line Filters . (Not on-site at APO, but can be obtained on loan--contact Jeff Morgan at UWash, morgan/astro.washington.edu) . York narrow-band interference filter set . What to do with the trace data. APO Filters Homepage

... The MMT optical spectra of SBS 0335-052W were obtained on 1996 January 19 with the Red Channel of the MMT Spectrograph. ... The linear scale is 1 = 263 pc at the distance to SBS 0335-052W of 54.1 Mpc. ... In Table 1, the observed line intensities and intensities corrected for interstellar extinction for SBS 0335-052W are shown along with extinction coefficient C (H ), observed flux of the H emission line, the equivalent width EW (H ) and equivalent width of absorption Balmer hydrogen lines EW (abs)....

Solar High Resolution Studies . Back to . Solar Group . ... The study of photospheric "quiet" structures can have deep implications for a large variety of astrophysical topics, ranging from energy transport in astrophysical plasmas, to MHD problems in fluids with elevated Reynolds number. The wealth of structures and scales visible in the quiet solar photosphere is well exemplified in this white light movie, obtained at the Dunn Solar Telescope at the NSO/Sacramento Peak on Oct. ...

... Meade Series 4000 Nebular Filters incorporate the very latest in interference coatings technology. ... Technical Basis of the Meade Broadband Nebular Filter: As shown in the transmission graph below, the Meade Broadband Nebular Filter strongly rejects the light of sodium- and mercury-vapor lights as well as natural airglow and auroral emissions. ... Meade Series 4000 Narrowband Nebular Filters . ... Meade Series 4000 Oxygen-III Nebular Filters . ... Meade Series 4000 Photo-Visual Color Filters . ...

... M94 or NGc 4736 is an early type spiral galaxy with tightly would spiral structure and a dominant, luminous central bulge. ... This exposure was for 1724 seconds through A1 and B1. ... NGC 7789 is an open stellar cluster in the Galaxy. This exposure is 1351 seconds through B5. ... The Coma Cluster of galaxies was observed for 1850 seconds through the A1 filter. ... NGC 1313 A spiral galaxy in the Fornax Cluster and host of two recent supernova was observed for 1384 seconds through A1 and B5. ...

The neutral hydrogen structure at high galactic latitude . ... Angular structure of the interstellar HI emission at 21 cm was investigated on the declinations of +5 degree, +16 dg., +27.5 dg., +39 dg. and +50 dg. in the R.A. range of 10 h to 16 h (galactic latitudes from 45 dg to 90 dg) with the help of RATAN-600 radio telescope with mean angular resolution 2.0'x 20'. ... Angular power spectrum of interstellar HI emission was computed with standard FFT code and smoothed over 1 h along R.A. (figure 1). ...

... Обзор LPR фильтра. Впечатления от наблюдений с LPR фильтром. ... Характеристики цветных фильтров Baader-Planetarium . Мой перевод pdf- файла о фильтрах с сайта Baader-Planetarium (379 кб) . ...

This library currently provides subroutines used to transform theoretical spectra to intermediate and broad-band photometric indices. ... Typical tasks are the response functions and transmission curves for various filters, mirrors and photomultiplier windows. ... The response is zero outside the given wavelength range. ... real . input . Wavelength in nanometres . PHOT_1P21 . ... PHOT_AIR . ... PHOT_ALUM . ... Inputs must be valid as for PHOT_FILTER, PHOT_AIR, PHOT_ALUM and PHOT_1P21. ...

... For SIMS (Secondary Ion Mass Spectrometry) analysis, a solid surface is bombarded by primary ions of some keV energy. ... The subsequent mass analysis of the emitted ions provides detailed information on the elemental and molecular composition of the surface. ... Extremely short ion pulses with a duration below . ... By rastering a fine-focussed ion beam over the surface, like an electron beam in an electron microprobe, mass resolved secondary ion images (chemical maps) can be obtained...

Metamaterial bandpass structures made of two-dimensional arrays of planar resonators Mikhail A.Tarasova, Artem M.Chekushkinb, Valerian S.Edelmanc, and Leonid S.Kuzmin a V.Kotel'nikov Institute of Radio Engineering and Electronics, Moscow, Russia b Chalmers University of Technology, Gothenburg, Sweden c P.Kapitza Institute for Physical problems b Abstract--Planar arrays of /2 open crosses designed for quasioptical filters in 300, 350, 450, 600 GHz bands were fabricated and experimentally studied. ...

XMM­Newton CCF Release Note XMM­CCF­REL­119 OM PSF Bing Chen June 13, 2002 1 CCF components Name of CCF VALDATE List of Blocks changed CAL VERSION XSCS flag OM PSF1DRB 0006 2000­01­01T00:00:00 PSF­U No PSF­B No PSF­V No PSF­UVW1 No PSF­UVM2 No PSF­UVW2 No 2 Changes This CCF file provides new measurement of OM PSF. ... 1 XMM­Newton CCF Release XMM­CCF­REL­119 Page: 2 Figure 1: Growth curves as a function of radius for V and UVW1 filters. ... Therefore, this new PSF is field position independent. ...

... 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. ...

... Solar Space Experiments in LPI . ... The main goal of the TESIS is to provide complex observations of solar active phenomena from the transition region to the inner and outer solar corona with high spatial, spectral and temporal resolution in the EUV and Soft X-ray spectral bands. ... Solar EUV Coronagraph (SEC), based on the Ritchey-Chretien scheme, to observe the inner and outer solar corona from 0.2 to 4 solar radii in spectral band 290-320 A . ... 2 arc. sec./pix . ... Backside-CCD 2048*2048 pix...

... 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 . ...

Figure 2 Microcalorimeter resolution example. The two pannels in the plot show histograms of the filtered pulse heights that result from left: random samples of the microcalorimeter voltage (a measure of the intrinsic detector resolution) and right: pulses from the absorption of Mn K-alpha x-rays. The smooth curves are gaussian profiles with the FWHM as labeled; in the right pannel the gaussian profile has been convolved with the shape of the Mn K-alpha x-ray line doublet. ... 617) 495-7062 . ...