... The choice of exposure time generally depends on the signal-to-noise ratio required to meet the science goals. ... See "Overhead Times" on page 29 for more information about exposure timings.) ... For example, shortening an exposure from 400s to 350s has no effect on orbit packing; they both require 9 minutes to execute ( CLOCKS=NO, the default setting). On the other hand, shortening an exposure from 180s to 160s trims the execution time by 2 minutes (again CLOCKS=NO, the default setting). ...

... Classes . ... casa::Timer . ... user () const . ... Get the user+system time (in seconds) since last "mark()". double . ... Get the user+system time (in seconds) since last "mark()". double casa::Timer::all_usec . ... Get the user+system time (in microseconds) since last "mark()". void casa::Timer::mark . ... Show real, user, system time (in seconds) on cout or a user supplied stream. double casa::Timer::system . ... Get the system time (in microseconds) since last "mark()". double casa::Timer::user...

... Basic time functions . ... Example 2: Set a random number seed . ... Uses of time functions include: . ... time_t time(time_t *tloc) -- returns the time since 00:00:00 GMT, Jan. 1, 1970 , measured in seconds. ... timer.c */ #include <stdio.h> #include <sys/types.h> #include <time.h> main() { int i; time_t t1,t2; (void) time(&t1); for (i=1;i<=300;++i) printf(``%d %d %d n'',i, i*i, i*i*i); (void) time(&t2); printf(`` n Time to do 300 squares and cubes= %d seconds n'', (int) t2-t1); } . ...

Below is a completely filled-in sample of the Five-Minute-Task Time Estimate Worksheet How long will the five-minute task/project take? 5 minutes For each item below, please provide your best estimate for the time required for completion. ... deal with the compile-time errors you failed to anticipate: . ... figure out why it dumps core before executing first line of code: . ... it seems to work; now fully test all new/changed functionality by hand: . ... write/update program documentation: . ...

... Stellar Evolution . Nucleosynthesis in Stars . The Evolution of Star Clusters . JAVA Physics Lab . Alternative Energies Class . Steve Kevan's Physics 251 Class . ... Talk on Solid State Physics of CCD detectors . Talk on Cosmological Issues . ... Digital Spectra of Stars . NETexperts E-mail List . The Electronic Universe Project e-mail: nuts@moo.uoregon.edu ...

... 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. ...

... Flats : Properly exposed flats over all echelle orders require a two-step process. Flats are taken both with and without a CuSO4 (aka "blue") filter in the beam. ... Suggested exposures are 7 seconds ("red"; no filter) and 240 seconds ("blue", CuSO4 filter) yielding S/N values of ~480. The filter for "blue" flats is listed as "blue" in the Config window in Echelle control under Remark. ... Exposure times for objects can be derived from the following plot: . ...

... Show Times . ... Please select the appropriate show programme either 'term time' or 'school holiday' period. ... For more information on new events please visit the Armagh Planetarium Events Blog . ... Due to the darkness and sound levels children under six years old are only permitted to shows appropriate to this age range. Check the shows now playing page to find out what shows are suitable for young children. ... Armagh Planetarium reserves the right to change the show programme without notice. ...

... Table shows a table of association rules that has been created to associate bias exposures with scientific frames. ... ABS(:MJD_LOC-REFVAL(:MJD_LOC)) is the absolute difference between the time of the scientific frame that is being studied and the time of a dark exposure . ... The graphs of Figure illustrate the association of two dark exposures with each of two scientific images from our observing run: susi0006.bdf and susi0009.bdf. ... Table: Rules for the association of DARK exposures (cf. ...

... Apache HTTP Server Version 2.2 . Apache > HTTP Server > Documentation > Version 2.2 > Programs . ... rotatelogs is a simple program for use in conjunction with Apache's piped logfile feature. It supports rotation based on a time interval or maximum size of the log. ... For example, if the rotation time is 3600, the log file will be rotated at the beginning of every hour; if the rotation time is 86400, the log file will be rotated every night at midnight. ... date and time (localized) . ...

Next: Imaging by an Optimizing Method . ... A big advantage of this numerical integrator is its stability: the error in the semi-major axis and the eccentricity depends only on the step size and does not grow with an increasing number of time steps. ... As the integration time increases, the numerical results become more contaminated by various errors. ... A new symplectic integrator produces no secular truncation errors in the actions of a Hamiltonian system. ...

... Here follow some typical calls to epchain : epchain This processes the first IMAGING mode exposure (i.e. PNS010) and is equivalent to one of the calls epchain datamode = IMAGING odfaccess = odf exposure =010 schedule=S epchain datamode = IMAGING odfaccess =oal exposure =1 epchain datamode = IMAGING exposure =1 epchain odfaccess =name ... The call epchain datamode=ALL odfaccess=all will process all exposures of an ODF, independent of observing mode. ...

Next: When the clock is Up: Keeping Time Previous: The hardware and software . In the Debian system, the system time zone is determined by the symbolic link /etc/localtime љ . ... If it is unset, the system time zone is assumed. ... The date љ command shows the current date and time. ... date љ is also used to set the kernel's software clock: # date 07142157 . ... While each user can have his own time zone, the clock is the same for everyone. date љ only shows or sets the software clock. ...

... For these observations night-time is required. Begin ­ End Interval­Interval ­ ­ ­ ­ 2 Days Needed at This Interval Time Constraints (Must Be Justified in the Prop osal Text) LST 0700 0700 0930 1715 Range - 1145 - 1300 - 1300 - 2000 Nights Notes 19 NGC 2577/UGC 4375 + Leo I Group 6 NGC 2577/UGC 4375 + Leo I Group + Abell 1367 51 Leo I Group + Abell 1367 89 Local Void (complete in second semester ) Constraints on scheduling: The Turn On Galfa Survey ( TOGS ) operates commensally with ...

... The Network Time Protocol (NTP) is used to synchronize the time of a computer client or server to another server or reference time source, such as a radio or satellite receiver or modem. ... Information on the NTP architecture, protocol and algorithms can be found in the Further Information and Bibliography page. The Building and Installing the Distribution page presents an overview of the procedures for compiling the distribution and installing it on a typical client or server. ...

An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . THE ANCIENT UNIVERSE . c) The Age of Light from the Most Distant Galaxies: The "Time Machine" Effect . ... Thus we are actually seeing these galaxies not as they are today, but as they were billions of years ago. ... The Universe: An Overview | ... The Ancient Universe - The Age of the Expanding Universe - The Age of the Oldest Stars - The Age of Light From Distant Galaxies - The Age of the Chemical Elements | ...

... new: . ... Python 2.6.2 + most up-to-date modules (December 2009) . ... pyQC script structure . ... The current installation of python and its associated modules on our DFO machines is extremely old (i.e. python 2.4.2 was released in Sept. ... The new python executable lives in: /qcdp/bin/python . ... The first figure shows the execution times for the old python installation, while the second figure shows the execution times based on scripts running the python 2.6.2 installation with the new modules...

... MaximDL и PinPoint с ошибкой "The plate's exposure start time is required for catalog proper motion calculation. Check the attached image." ... Прошу помощи в разборках с MaximDL и PinPoint. ... Кадры открываются в MaximDL при указании формата RAW и размера. Когда пытаюсь распознаться ПинПоинтом (или в Максиме или в отдельном) вылезает ошибка: The plate's exposure start time is required for catalog proper motion calculation. ... Откуда качнуть эти метры? http://www.cyanogen.com/help/maximdl.. ...

... Tables for transformation from universal to sidereal time scale. Explanations. This page contains three little tables headed Hours Minutes Seconds respectively. Each the table have two columns: first of them is input column where time in whole time units of universal time is given, and second of them is output column where hours:minutes:seconds of sidereal time is presented. ... Example: transform 02 h 12 m 22.00 s from universal to sidereal time. ...

. Please, enter light elements for your star and Julian Day interval. HJD0: . Period: . JD1: . JD2: .