About Chandra Archive Proposer Instruments & Calibration Newsletters Data Analysis HelpDesk Calibration Database NASA Archives & Centers Chandra Science Links

Skip the navigation links
Last modified: 21 November 2006

URL: http://cxc.harvard.edu/ciao3.4/bugs/tg_resolve_events.html
Hardcopy (PDF): A4 | Letter

Bugs: tg_resolve_events


Caveats

  1. Aspect files must be arranged in chronological order


Caveats

  1. Aspect files must be arranged in chronological order

    tg_resolve_events assumes that the aspect files given in the acaofffile and alignmentfile parameters are arranged in chronological order. If the files are not in order, the tool will exit with an error.

    If you have not altered the original filenames, a simple "ls" will put them in order, as the time is listed in the filename:

    unix% pwd
    /data/459/primary
    
    unix% ls -1 pcad*
    pcadf063874624N002_asol1.fits
    pcadf063875522N002_asol1.fits
    pcadf063902942N002_asol1.fits
    

    Otherwise, get the value from the TSTART header keyword:

    unix% dmkeypar pcad_1.fits TSTART echo+
    63875522.3455031
    

    and put the files in chronological order.

Hardcopy (PDF): A4 | Letter
Last modified: 21 November 2006


The Chandra X-Ray Center (CXC) is operated for NASA by the Smithsonian Astrophysical Observatory.
60 Garden Street, Cambridge, MA 02138 USA.    Email: cxcweb@head.cfa.harvard.edu
Smithsonian Institution, Copyright © 1998-2004. All rights reserved.