1. Taking flat frames

•  edit crontab, add 3 parameter NO_SCRIPT in line where run_pisys! is started, this disables running of night script YYYYMMDD.pish for
  this night
  
• go to scripts directory, copy script do_flats.pish :
    cp do_flats.pish do_flats_20050123.pish
• edit new script do_flats_20050123.pish and change numbers 1,2,3 etc to proper hours ( as system starts in YYYYMMDD.pish script - 21:15 or something like this )
• after system is started , run pishell and execute script :
     piman 0 exec_script(do_flats_20050123.pish)
• coment out lines in YYYYMMDD.pish script which already expired in the moment when taking flats is finished, and execute :
    piman 0 exec_script(YYYYMMDD.pish)
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