The choice of exposure time generally depends on the signal-to-noise ratio required to meet the science goals. ... It shows the total time required to execute a single CR-SPLIT=NO exposure, excluding any time needed to change filters. ... On the other hand, shortening an exposure from 180s to 160s trims the execution time by 2 minutes (again CLOCKS=NO, the default setting). ... This includes time to prep the CCD, execute the exposure, and readout the CCDs. ... Exposure Time (s) . ... CLOCKS=YES . ...

Еще в разделе: (Показать все результаты (>19699) - www.stsci.edu/ )

• Overhead Times

Next: Sky background definition Up: Background Definition Previous: Smoothing spline interpolation . The command BACKGROUND/SMOOTH enables to define the background without previous order definition. This feature is useful for example to correct for the background the image required for the order definition. ... All above methods are implemented in command BACKGROUND/ECHELLE and selected by the echelle keyword BKGMTD . ...

Еще в разделе: (Показать все результаты (>2186) - www.sao.ru/ )

• mod_ext_filter - Apache HTTP Server
• JavaScript Mail Filters in Navigator 4.0
• Filters - Apache HTTP Server

... Tsys information was not written to the rpfits file (a nominal 25K values was used), so the amplitudes need to be adjusted based on a separate log file. ... def xyscale(data,xtsys=1.0,ytsys=1.0,nomtsys=25.0) : data.set_cursor(pol=0) data.scale(xtsys/nomtsys,allaxes=False) data.set_cursor(pol=1) data.scale(ytsys/nomtsys,allaxes=False) data.set_cursor(pol=2) data.scale((xtsys+ytsys)/(2*nomtsys),allaxes=False) data.set_cursor(pol=3) data.scale((xtsys+ytsys)/(2*nomtsys),allaxes=False) . ...

Еще в разделе: (Показать все результаты (>13330) - www.atnf.csiro.au/ )

• casacore: casa::LogFilter Class Reference
• casacore: casa::LogFilterTaql Class Reference
• casacore: casa::LogFilterInterface Class Reference

... Apache HTTP Server Version 2.4 . ... This document describes the use of filters in Apache. Filtering in Apache 2 . ... Filters can be used to process content originating from the client in addition to processing content originating on the server using the mod_reflector module. mod_reflector accepts POST requests from clients, and reflects the content request body received within the POST request back in the response, passing through the output filter stack on the way back to the client. ...

Еще в разделе: (Показать все результаты (>7120) - www.arcetri.astro.it/ )

• Mail Filters
• mod_ext_filter - Apache HTTP Server
• mod_sed - Apache HTTP Server

... 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) . ...

Еще в разделе: (Показать все результаты (>15) - www.shvedun.ru/ )

• Baader NEODYMIUM (Moon & Skyglow) filter

grdfilter - Filter a . grd file in the Time domain grdfilter input _ file . grd -D flag -F < type >< width > -G output _ file . ... The output . ... grd The file of points to be filtered. D Distance flag tells how grid (x,y) relates to filter width as follows: flag = 0: grid (x,y) same units as width , Cartesian distances. flag = 1: grid (x,y) in degrees, width in kilometers, Cartesian distances. flag = 2: grid (x,y) in degrees, width in km, dx scaled by cos(middle y), Cartesian distances. ...

Еще в разделе: (Показать все результаты (>355) - xray.sai.msu.ru/ )

• http://xray.sai.msu.ru/~ivan/gmt/man/splitxyz.html
• http://xray.sai.msu.ru/~ivan/gmt/man/filter1d.html
• http://xray.sai.msu.ru/~ivan/gmt/man/blockmode.html

... Meta Index / Home Page . ... Spectrum Extraction . ... Filtering stage (selector) . ... Light Curve Extraction . ... Image Extraction . ... Errors | ... EXPOSURE . Exposure Information | ... Parameters . ... dss.fits:SPECTRUM . Usage Examples . ... Histogram Extraction | ... ERROR . ...

Еще в разделе: (Показать все результаты (>12350) - xmm.vilspa.esa.es/ )

• Example 4: Specifying an external detector map for an extended source

... Select the letters . ... Duplicate the black channel into a new document and apply the emboss filter (Angle=90°, height=1 pixel, Amount= 330%), then apply a 1-pixel gaussian blur. ... Apply the emboss filter (Angle=0°, height=1 pixel, Amount=130%) and then apply the Solarize filter. ... Apply the emboss filter (Angle=-45°, Height=1 pixel, Amount=80%) . ... Apply the emboss filter (Angle=-45°, height=1 pixel, amount=300%), then the Unsharp Mask Filter (Amount=100%, Radius=5 pixels, Threshold=0) . ...

Еще в разделе: (Показать все результаты (>2593) - www.sai.msu.su/ )

• Hands On; The Button Mask
• CoolType - Fire
• GIMP animations: merge-anim example 5

Example 2: Figure 8 (90 Kbytes) shows an image of M31. While this is not a particularly spectacular image of M31 it is nevertheless unique as it was taken in a suburban backyard using a Lynxx CCD camera. The exposure is unfiltered. ... The image scale in this system is 41 arcseconds per pixel which yields a total field size of 2.2 x 1.9 square degrees. At this pixel resolution M32 blends into the light of M31, although NGC 205 (marked with a red arrow) is plainly visible. ... Page 6 . ...

Еще в разделе: (Показать все результаты (>333) - zebu.uoregon.edu/ )

• Galaxy Gallery Page III
• CCD Astronomy Magazine Article Page 4
• Astronomy HyperText Book

... example, note below the dramatic speedup in searching a 1 Gb file using an AND filter, even when one of the columns (pha) has no index : time fundisp \ huge.fits'[idx_activate=0,idx_debug=1,pha= 2348 4000 4000 1]' \ x y pha x y pha ---------- ----------- ---------- 3999.48 4000.47 2348 3999.48 4000.47 2348 3999.48 4000.47 2348 3999.48 4000.47 2348 3999.48 4000.47 2348 ... Currently, indexed filtering only works with FITS binary tables and raw event files. ...

Еще в разделе: (Показать все результаты (>2483) - hea-www.harvard.edu/ )

• Table Filtering
• Event Filtering
• Combining Region and Table Filters

... Previous: Background Fluctuation Analysis from the Multiscale Entropy . ... A new measure of information is defined which is based on noise modeling and incorporates resolution scale. Properties of this measure are discussed. ... Additionally it allows for image noise modeling, and subsequent noise removal. ... Hence information- and entropy-based processing technologies will be necessary for the effective design and implementation of large, future generation, image databases. ...

Еще в разделе: (Показать все результаты (>1843) - www.adass.org/ )

• Filtering KPNO LaTeX Observing Proposals with Perl
• TransVERSE: An Architecture for Configuring Astronomical Observations
• Improvements in Filter Design for Removing Galactic ``Cirrus'' from IRAS Images

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

Еще в разделе: (Показать все результаты (>28) - www.vista.ac.uk/ )

... The STECF IRAF layered package impol provides five tasks specifically aimed at reduction of HST imaging polarimetry data for ACS, FOC, NICMOS and WFPC2. ... Reduction of HST polarimetry data and simulation of raw polarimetry images, together with polarization vector plotting, are covered. ... hstpolsim -- Produce simulated polarization input data frames for HST instruments from images of the total signal, the linear polarization and the position angle of the polarization vectors. ...

Еще в разделе: (Показать все результаты (>47622) - www.eso.org/ )

• pyQC: Python 2.6.2
• Infrared jitter imaging data reduction algorithms
• HSTPOLSIM (V2.00) --- November00 --- HSTPOLSIM (V2.00)

Log windows display messages from all "actors" (instruments, the TCC, the hub...) and allow you to send commands. Controls along the top allow you to filter out unwanted garbage or highlight messages of particular interest. ... Regular Expressions . ... The entry field for "+ Actors" and "+ Commands" filtering accept space-separated regular expressions . ... If you plan to send many messages to a particular actor, you may select the actor from the menu next to the command entry field. ...

Еще в разделе: (Показать все результаты (>657) - www.apo.nmsu.edu/ )

• Suggested Exposure Times For Calibration Spectra
• Guider Mechanical Commands
• Apache Point Obs. filters

... Several HST instruments both current and decommisioned have provided imaging linear polarimetry capabilities. ... The STECF IRAF layered package impol provides five tasks specifically aimed at reduction of HST imaging polarimetry data. ... Reduction of HST polarimetry data and simulation of raw polarimetry images, together with polarization vector plotting, are covered. ... For reduction of data from imaging linear polarization instruments other than from HST, the instrument name is `SPECIAL'. ...

Еще в разделе: (Показать все результаты (>256) - www.stecf.org/ )

• HSTPOLSIM (V1.00) --- April99 --- HSTPOLSIM (V1.00)
• NICMOS Observes the Galactic Center

... FIELD | ... METHOD . ... static int . ... Set this flag to have the ImageProcessor that is passed to the run() method converted to a FloatProcessor. static int . ... Set this flag if the filter wants its run() method to be called for all the slices in a stack. static int . ... Set this flag if the filter does not want its run method called. static int . ... Set this flag if the setup method of the filter should be called again after the calls to the run(ip) have finished. static int . ...

Еще в разделе: (Показать все результаты (>780) - www.astro.louisville.edu/ )

• Filters (ImageJ API)
• Calibrator (ImageJ API)
• CalibrationBar (ImageJ API)

Title , Contents , Index . rtftohtml reads up RTF format documents and translates them to HTML. In processing text, the filter chooses HTML markup based on three characteristics
. ... The paragraph style
. ... For paragraph and text styles, the rules for translation are contained in a file called html-trans
(see Section 5.1 ). ... If a paragraph style is not found, a warning will be generated and the text will be written to the HTML file with no special markup.) ...

Еще в разделе: (Показать все результаты (>540) - comet.sai.msu.ru/ )

• Examples of executing commands with the find command
• Examples of opening a connection to a remote host
• rtftohtml Users Guide - 2 How it works

Digital FIR Decimating Filter for GALFA Spectrometer Documented by Wonsop Sim, July 30th, 2004 Introduction: The GALFA Spectrometer Board requires a decimating FIR filter to reduce the bandwidth from 100MHz by a factor of fourteen to 7.14MHz. ... A filter with symmetric coefficients can reduce the number of multiplies in half by pre- adding input samples. ... The coefficients have been grouped so that they correspond to the fourteen pre- added input samples that are calculated in a filter section. ...

Еще в разделе: (Показать все результаты (>3650) - www.naic.edu/ )

• http://www.naic.edu/~phil/hardware/lbnfb/lbnfb.html
• Setting up the IF/LO
• NVIDIA CUDA SDK Code Samples

... Tpram - time of the PRAM instrument (aquisition computer) . ... Bx - DC magnetic field with a fixed amplitude calibration; X component . ... The color lines present FFT from the AC magnetic field (Waveform); Bwx, Bwy, Bwz - from the bottom. ...

Еще в разделе: (Показать все результаты (>647) - www.cosmos.ru/ )

... Tpram - time of the PRAM instrument (aquisition computer) . ... Bx - DC magnetic field with a fixed amplitude calibration; X component . ... The color lines present FFT from the AC magnetic field (Waveform); Bwx, Bwy, Bwz - from the bottom. ...

Еще в разделе: (Показать все результаты (>585) - www.iki.rssi.ru/ )