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... The Wide Field Planetary Camera 2 (WFPC2) is now a mature and largely well-characterized instrument. Information already available through the WFPC2 Instrument Handbook and the HST Data Handbook is fairly complete. In this update we provide additional information obtained from recent studies of the instrument, as well as calibration plans for the WFPC2 and a short note on present and planned imaging capabilities for HST. ... Calibration: Calibration of WFPC2 continues. ...

... This page contains links to delay line Final Design Review documents which have been released by Cavendish Laboratory. ... System Overview . Trolley Mechanical Design Description [to be updated] . ... Trolley Electronics Design Description [updated 2008/01/28] . Limits Design Description [to be updated] . ... Metrology System & VME Hardware Design Description (INT-406-VEN-0113) . ... Printable View of http://www.mrao.cam.ac.uk/projects/OAS/pmwiki/pmwiki.php/MROIDelayLine/ReleasedFDRDocuments) ...

... Tools Show pagesource Old revisions Backlinks Recent Changes Media Manager Sitemap Log In > . ... You are here: start €Ё lbaops €Ё pcfshints . ... VLBI Schedule . ... Observer's Wiki . ... Other VLBI . ... lbaops:pcfshints . ... PCFS time is wrong . PCFS time will not update (complains time is off by greater than 2 weeks) . ... Normally the PCFS synchronizes its time from from the S2 formatter. Typing the command: . ... lbaops/pcfshints.txt €§ Last modified: 2015/12/18 16:39 (external edit) . ...

I-GALFA Documents and Links . Commensal Projects . Inner-Galaxy ALFA (I-GALFA) Low-Latitude H I Survey . Project a2186 proposal [Oct 2005] : cover + body . ... EALFA Zone of Avoidance (ZOA) Survey . Project a2144 proposal [Oct 2005] : cover + body . GALFA Continuum Transit Survey (GALFACTS) . Project a2390 proposal [Feb 2008] : cover + body . ... Other ALFA Survey Materials . GALFA Main Page + Survey Groups + H I Projects . ... ALFA Main Page . ... I-GALFA main page ...

... LWN.net FAQ . ... Read-copy-update (RCU) is a mutual exclusion technique which can operate without locking most of the time. It can yield significant performance benefits when the data to be protected is accessed via a pointer, is read frequently, changed rarely, and references to the structure are not held while a kernel thread sleeps. The core idea behind RCU is that, when the data requires updating, a pointer to a new structure containing the new data can be stored immediately. ...

... TNG . ... FIRST LIGHT OF ARNICA . ... The ARcetri INfrared CAmera ( ARNICA ) has been installed in the week 6-13 December 1998 at the TNG Nasmyth A focus (see Figure 1.) The interface is meant to support the optical imager ( OIG ), the infrared camera (ARNICA will be later substituted by NICS ), and the adaptive optics module ( ADOPT@TNG ). ... Arnica is a DRO camera for infrared imaging operating in wavelength range between 0.9 and 2.6 microns and is equipped with a Nicmos3 256x256 detector. ...

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... EPIC-PN response files for small window and large window mode are now also available. Response files for timing mode and burst mode will be available soon. ... doubles selected from CCD lines 180-199, medium filter . ... Y9 CCD lines 180-199 All these files are under the ccd directory. The files designated with the filter, thin, medium, and thick, are response files which have combined the spectral response matrices (RMFs) with the on-axis effective areas (ARFs), having the extension rsp . ...

Next: Study to Install an Information System at the University of the Istanbul Astronomy and Space Sciences Department . ... NOAO 1 , P.O. Box 26732, Tucson, AZ 85726 . A system for publishing frequently updated information to the World Wide Web will be described. Many documents now hosted by the NOAO Web server require timely posting and frequent updates, but need only minor changes in markup or are in a standard format requiring only conversion to HTML. ... NOAO 1 . ...

Hide Zen home . ... GiST . GIN . ... For integer arrays GIN is 10x slower than GiST on update . ... Updating of 100 rows in 100,000 takes < 0.5s for GIN index, which is quite reasonable speed. ... Example of populating a table - 10000 rows, with integer arrays cardinality 500 and maximal array length of 100. sh ./test-id.sh -l 100 -n 10000 -v 500 | ... Example of update SQL - update first 300 rows update tt set a=array( select(1000*random())::integer+generate_series( 0,200+id) ) where id < 300; . ...