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1. VISTA ETC - Exposure Time Calculator
... Exposure Time Calculator (ETC) . ... ESO - Public Surveys . ... the recommended values to use for DIT, . ... Detector on-chip integration (DIT): seconds. to your chosen value - a separate page gives recommended values to use for DIT - for modes 1 and 2 below you may wish to start with the maximum recommended values as these will minimize the effect of read noise (a total object exposure of Y secs with DIT=X secs will produce Y/X lots of read noise) and give you a lower limit on the time needed. ...
[ Сохраненная копия ]  Ссылки http://www.vista.ac.uk/observing/etc/index.html -- 15.1 Кб -- 28.03.2013
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2. http://www.stsci.edu/instrument-news/handbooks/nicmos/c10_backgrounds.doc4.html
... They include: 4 dither patterns, 4 chop patterns, and 3 dither-chop patterns. For each of these, the observer will be able to specify, during the Phase II Proposal submission, the total number of positions desired (2 to 40), the dither size (0 to 40 arcsecs), the chop size (0 to 1800 arcsecs), and the orientation of the pattern on the sky. ... In addition, the figure number where the pattern is graphically shown is given in column 5 of Table 10.1 . ... Figure 10.3 . ... 0.0 - 1800.0 . ...
[ Сохраненная копия ]  Ссылки http://www.stsci.edu/instrument-news/handbooks/nicmos/c10_backgrounds.doc4.html -- 10.3 Кб -- 07.08.1997
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3. Exposure number.
XMM-Newton Science Analysis System . rgssources (rgssources-6.0.1) [xmmsas_20070708_1801-7.1.0] . ... Upgrading the format. rgssources can also deduce the exposure number from the standard file name formats described above. ... If the file name is not in a standard format, and the exposure number is not otherwise known, its use can be turned off by setting writeexpkwds to `no' or `false'. ... XMM-Newton SOC/SSC -- 2007-07-09 ...
[ Сохраненная копия ]  Ссылки http://xmm.vilspa.esa.es/sas/7.1.0/doc/rgssources/node25.html -- 3.8 Кб -- 09.07.2007
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Еще в разделе: (Показать все результаты (>18481) - xmm.vilspa.esa.es/ )

4. Bias-Free Parameter Estimation with Few Counts, by Iterative Chi-Squared
... We demonstrate through numerical simulations that model parameters estimated with our technique are essentially bias-free, even when the average number of counts per bin is 1. ... The IW technique avoids such biases by estimating through successive iterations, where for each iteration, j, , and the best-fit parameters are determined by minimization of . ... In our sample, we find that the minimum values and best-fit parameters converge after about 6 iterations. ...
[ Сохраненная копия ]  Ссылки http://www.adass.org/adass/proceedings/adass94/kearnsk.html -- 12.3 Кб -- 03.11.2000
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5. Strategy
Next: Standard stars Up: Extinction and transformation Previous: Equations of condition . ... It is better to have 5 observations each of 30 standard/extinction stars, than to have 3 observations each of 50 stars; in the latter case, we are spreading the same observational weight over nearly twice as many parameters. ... In sum, though one can hardly have too many observations of standard stars, one should not go beyond the optimum number of stars recommended by the planning program. ...
[ Сохраненная копия ]  Ссылки http://www.sao.ru/precise/Midas_doc/doc/94NOV/vol2/node295.html -- 5.1 Кб -- 23.02.1996
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6. Scheduling Mark II Observations
Next: Head Positions and Track Up: OBSOLETE SECTIONS Previous: Mark III Observations Contents . ... Mark II recording systems have been removed from most active VLBI stations and the main Mark II correlators are no longer operating. ... Below is an example of a simple Mark II schedule. ... OBSMODE = '6cm Mark~II Standard Setup' ! ... SRCFILE = sources.obs ! ... EXAMPLE: Setup file for Mark~II observations (1 channel) at 6cm. -------------------------------------------------------------------- ! ...
[ Сохраненная копия ]  Ссылки http://www.atnf.csiro.au/people/Tasso.Tzioumis/sched/Scheduling_Mark_II_Observat.html -- 10.1 Кб -- 10.04.2016
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7. http://xray.sai.msu.ru/~ivan/gmt/man/trend1d.html
trend1d - Fit a [weighted] [robust] polynomial [or Fourier] model for y = f(x) to xy[w] data. trend1d -F < xymrw > -N [ f ] n _ model [ r ] [ xy [ w ] file ] [ -C condition _# ] [ -H [ nrec ] ] [ -I [ confidence _ level ] ] [ -V ] [ -W ] [ -: ] [ -bi [ s ][ n ] ] [ -bo [ s ] ] trend1d reads x,y [and w] values from the first two [three] columns on standard input [or xy [ w ] file ] and fits a regression model y = f(x) + e by [weighted] least squares. ... E.g., a robust quadratic model is -N 3 r . ...
[ Сохраненная копия ]  Ссылки http://xray.sai.msu.ru/~ivan/gmt/man/trend1d.html -- 8.1 Кб -- 19.03.1999
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8. The new precision concept
... The two common precisions single precision (SP) and double precision (DP) on a system based on IEEE 754 can specified with INTEGER , PARAMETER :: SP = SELECTED_ REAL _ KIND (6,37) INTEGER , PARAMETER :: DP = SELECTED_ REAL _ KIND (15,307) REAL ( KIND =SP) :: single_ precision _variables REAL ( KIND =DP) :: double _ precision _variables If we wish to work with at least 14 decimal ...
[ Сохраненная копия ]  Ссылки http://star.arm.ac.uk/f77to90/c13.html -- 3.6 Кб -- 10.02.1996
[ Сохраненная копия ]  Ссылки http://crydee.sai.msu.ru/f90/c13.html -- 3.6 Кб -- 10.02.1996
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9. FORS Sec Std and Abs Phot Project
... The first step to improve the FORS calibration is therefore to obtain data to allow a computation of the illumination correction across the field. ... Another limitation on the calibration accuracy has been the brightness of the Landolt standards which have forced the use of extremely short exposures introducing small but non-negligible shutter-time errors and also resulting in a very small number of useful standards per frame. ...
[ Сохраненная копия ]  Ссылки http://www.eso.org/~pmoller/FIZZWIG-FAP/New_Paradigm.html -- 7.0 Кб -- 18.07.2007
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10. Writing programs that use comedi and comedilib
Comedi Documentation . ... Right to the source: #include <stdio.h> /* for printf() */ #include <comedilib.h> int subdev = 0; /* change this to your input subdevice */ int chan = 0; /* change this to your channel */ int range = 0; /* more on this later */ int aref = AREF_GROUND; /* more on this later */ int main(int argc,char *argv[]) { comedi_t *it; lsampl_t data; it=comedi_open("/dev/comedi0"); comedi_data_read(it,subdev,chan,range,aref,&data); printf("%d\n",data); return 0; } . ...
[ Сохраненная копия ]  Ссылки http://mavr.sao.ru/hq/sts/linux/comedi/doc/x94.html -- 8.9 Кб -- 28.12.2007
[ Сохраненная копия ]  Ссылки http://www.sao.ru/hq/sts/linux/comedi/doc/x94.html -- 8.9 Кб -- 02.10.2012
[ Сохраненная копия ]  Ссылки http://jet.sao.ru/hq/sts/linux/comedi/doc/x94.html -- 8.9 Кб -- 02.10.2012
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11. Converting Arecibo Interim Correlator data into a FITS image
This is an interim program to convert Arecibo data into `regular' fits format files. ... Offset 5400.000000 (5399.719945) Object:U4131 Number of scans in an image:4 Number of dumps in a scan:300 Commands are (all caps required): QUIT to stop converting, DRIVE to finish