A spectrometer with 16 input channels (8 dual polarization), based on the ALMA Tunable Filter Board. ... A. Russo, G. Comoretto: Spettrometri a correlazione e a FFT per il radiotelescopio SRT , Arcetri technical report 1/2005 . G. Comoretto, A. D'Ambrosi, R. Nesti, A. Russo, F. Palagi: A modular multichannel spectrometer - design study Arcetri technical report 4/2006 . ... G. Comoretto, G. Tuccari: Reference design for the Digital BBC Architecture Arcetri technical report 2/2008 ...

Description and Specifications (html) ( pdf ) . System Block Diagram (pdf) . ... GALFA Spectrometer Setup, Operations, Basics Manual (pdf) . GALFA Diagnostic Software Overview . ... Polyphase Filter Bank . ... Design of Quadrature Downconverter Board (pdf) . Design of Low-Pass Filters (pdf) . Design of 16-Channel DAC/Gain Control Board (pdf) . ... Design of Digital Decimating FIR Filter (pdf) . ... Quadrature downconverter (August 9, 2004) . Spectrometer board (September 1, 2004) . ...

Flexible frame grabbing to PC over PCI bus from area & line scan cameras . ... Analog input up to 20 MHz and digital input up to 32 Mbytes/Sec. ... The LPG-132 will easily interface to virtually any analog or digital camera and provides lightning fast PCI transfers at an amazingly attractive price. The LPG-132 will interface with any camera or sensor at data rates up to 32 Mbytes/Sec. ... The LPG-132 comes in two configurations - one for analog input and the other for digital inputs. ...

Dick Ferris [0] Receiver architecture, correlator architecture, digitisation, beamforming, interference mitigation, data transport, cost and complexity are inexorably intertwined. A combination of baseband receiver, digital filterbank correlator and mixed delay and phase digital beamformers, provides a flexible and efficient solution. ... Data Growth & Compression In a 4k channel filterbank the word size necessarily grows by 6 bits in order to maintain the input dynamic range. ...

... The Digitized Sky Survey is now available on CD-ROMs and will be on the ST ScI archive. ... ST ScI has digitized Schmidt plates of the entire Sky. ... The software then accesses the data, decompresses the scans and returns the data in a form of a photographic intensity as a function of x and y plate pixel coordinates. ... accesses the Digitized Sky Survey (DSS) CD ROMs and decompressed the data returning a photographic intensity as a function of x and y pixel coordinates. ...

... Building subroutine libraries . ... This was particularly useful for providing global variables through COMMON blocks. ... Therefore there is a distintion between private COMMON (seen only by the subroutine library) and global COMMON, but this is a semantic distinction only. ... The distinction between private and global variables remains, but, in principle, there is a more legitiamte way to export "global" varaibles from a subroutine library than simply making the INCLUDE file globally visible. ...

WFC3 Instrument Handbook for Cycle 24 . ... Wide Field Camera 3 Instrument Handbook for Cycle 24 > Glossary . ... aXe : Spectroscopic Data Extraction Software . ... CSM : Channel select mechanism . ... GSFC : NASA?s Goddard Space Flight Center . Help Desk: Facility for getting help on HST related topics via email. help@stsci.edu. ... HST : Hubble Space Telescope . ... STSDAS : Space Telescope Science Data Analysis System. ... WFC : Wide-Field Channel of ACS . WFC3 : Wide Field Camera 3 . ...

... Our Java and Python software runs anywhere on Windows, Mac, and Linux . ... Alsvid - Algorithms for visualization and processing of image data with Python . Our observatory software . PyDome - Astronomical dome control in Python . ... Software archive . ... XEphem for visual access to astronomical data and remote telescope operation (Linux and Mac OS X) . ... SAOImage DS9 for astronomical data visualization (Linux, Mac OS X, and Windows) . ... G ttingen ImageJ astronomical resources . ...

Older methods used a monoalphabetic substitution which required both the encryption and decryption keys to be kept secret because one was trivially derived from the other. ... Where m is the plaintext message, P(m) is the message encrypted with the public key, P, and S(P) is P encrypted with the secret key, S. That is, the secret key, S, decrypts a message encrypted with the public key, P. S cannot be deduced from P . ... You encrypt your signature message with your secret key to obtain S(m). ...

... SOFTWARE AND HARDWARE COMPLEX FOR GROUNDBASED MEASUREMENTS OF THE MAGNETIC FIELD VARIATIONS . ... Global magnetometer network data are essential for understanding of the Earth current system and are used widely in different magnetosphere-ionosphere studies. ... So it was developed a special, project oriented hardware and software for groundbase magnetometer data collection and handling. Fig 1. shows general structure of hardware-software complex for geomagnetic data handling. ... The software . ...

The software available here is only available on an "as-is" basis. ... If you use this software, and it breaks your camera it is not my fault. First, there was QVplay . ... My first qv-300 webcam used this software, and a perl script that I put together. ... Note that the perl script had to be set up to copy the file to the web server, because NFS can't be trusted to update file modification times in a timely fashion. ... Beau software also sells webcam software for the QV cameras. ...

Alexander Dmitriev, Sergey Starkov, Sergey Yemetz . ... Mokhovaya st., 11, Moscow, 103907, Russia. ... Proceedings of 1998 Int. Symposium on Nonlinear Theory and its Applications, . ... 1093-1096 . Algorithms for generation of chaotic signals and for chaotic communications systems are proposed and implemented both in software and hardware. Experiments via physical wire channel with the use of Digital Signal Processors (DSP) are carried out in the speech–frequency band. ...

Digital Equipment Corporation has announced DEC Fortran 90/High Performance Fortran, which is a native Fortran 90/HPF compiler that includes support for parallel execution. ... For parallel execution, a package including DEC Fortran 90 V2.0 together with Digital's PSE is available for Alpha systems running Digital UNIX (OSF/1). For serial execution, DEC Fortran 90 V2.0 is available for Alpha systems running either Digital UNIX (OSF/1) or OpenVMS. ... DEC Fortran 90 V2.0 (for Digital UNIX) . ...

... System . By using software standards provided by most computer manufactures, ESO-MIDAS runs on VMS and OpenVMS systems (Trademarks of Digital Equipment Corporation) =, a large variety of UNIX (Trademark of AT ) platform, as well as one personal computers (386, 486, Pentium) running Linux. ... IBM/AIX RS/6000 systems; . ... The full MIDAS system requires of the order of 20 Mbyte of disk storage if shared libraries ( e.g. SUN, PC/Linux) are available, otherwise up to 100 Mbyte may be needed. ...

Warning: This is a collection of pointers (growing since 1994) about me, not a home page! ... My PostgreSQL page (locale support, GiST, tsearch2) . ... OpenFTS full text search engine . ... AstroNet (in Russian) - Knowledge Base on Astronomy . ... nature.web.ru (in Russian) - Scientific network . ... Oren Etzioni's Home Page (Web Clustering) . ... Richard K. Belew home page (AI in search engines) . ... Sabine Mayer home page - staircase join-enhanced PostgreSQL 7.3.3 . ... oleg@sai.msu.su ...

... Watchouts . ... Any XMM-Newton users, who need to convert OM count rates in the optical and UV filters into fluxes (expressed, e.g. , in erg/cm/cm/s/A), can do it by following any of the methods we outline below. OM count rates can be obtained with SAS. ... UVW1 . ... UVM2 . ... convert from count rate, obtained with SAS (files *SWSRLI*, corrected count rate in CORR_RATE column), to flux, selecting the most appropriate factor for the chosen spectral type and filter from the following Tables: . ...

Next: Imaging Polarimetry with NICMOS Up: NICMOS Data Calibration and Previous: The Photometric Performance of . ... NICMOSlook and Calnic C . ... Extracting spectra from a large number of NICMOS grism images requires a convenient interactive tool which allows a user to manipulate direct/grism image pairs. ... NICMOSlook and Calnic-C are two programs that were designed to take advantage of the fact that the NICMOS grism mode typically consists of taking both a direct and a grism image. ...

... Many boards supported by comedi have digital input and output channels. ... Comedi groups digital channels into subdevice, which is a group of digital channels that have the same characteristics. ... Individual digital lines can be read and written using the functions comedi_dio_read(device,subdevice,channel,unsigned int *bit); comedi_dio_write(device,subdevice,channel,unsigned int bit); . ... It indicates that an external digital line should be used to trigger the event. ...

... Astronomy for Kids . ... Astronomy 101 . ... Eicher book signing at Northeast Astronomy Forum . Buy and sell astronomy gear April 9 . ... Astronomy Foundation . ... Astronomy Day . ... When using my astronomy software or looking at various books, I notice that not everyone draws the constellations the same way. ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ... Astronomy Magazine . ...

Peremennye Zvezdy", . ... Max . Min . ... Data . ... max . ... 15.5 . ... min . Comm. 3 . ... MinII 15.6. ... NSVS 8710529. NSVS data confirms variability. ... NSVS 8710609. ... For V1219 Cyg (type IN, Hoffmeister, 1967) and NSVS 2122045+355634 (type L, Wozniak et al., 2004), our data is fully consistent with the existing classification, so we drop them from further consideration. ... Wozniak, P.R., Williams, S.J., Vestrand, W.T., Gupta, V., 2004, Astronomical Journal, 128, 2965 . ...