COPIPE (Jun01)                  pipeline                  COPIPE (Jun01)



NAME
    COPIPE   --    Camera    Offset    Pipeline.     Computes    angular  
    cross-correlations  between  simultaneous  GONG  images  recorded at
    different  sites  in  order  to  determine  an  optimal,  internally
    consistent,  set of equations describing the rotation of Solar North
    at each instrument.  A brief description of  the  algorithm  can  be
    found   in:  Toner  and  Harvey  1998  Sounding  Solar  and  Stellar
    Interiors, ed. J. Provost and F-X Schmider,  Proceedings  IAU  Symp.
    181, Poster Volume, Nice, France, 57.
    
    
USAGE
    copipe input start_date end_date
    
    
PARAMETERS
    
    input
        ASCII  file  containing a list of path names to the images to be
        cross-correlated
    
    start_date = "010312"
        Defines the starting  date  over  which  one  wants  to  compute
        correlations  between  simultaeous  image. Format is: YYMMDD (ie
        2-digit year, month, day).
    
    end_date = "010317"
        Defines  the  ending  date  over  which  one  wants  to  compute
        correlations  between  simultaeous  image. Format is: YYMMDD (ie
        2-digit year, month, day).
    
    tsample = 10
        Time sample spacing (minutes).  Select  the  "cadence"  for  the
        cross-correlations  (i.e.,  every  5  minutes, every 10 minutes,
        etc..)
    
    nannuli = 12
        The number of annuli  to  cross-correlate  between  simultaneous
        images.  Recommended  values: 10 for Classic images, 12 for Plus
        images
    
    nsectors = 1024
        The number of sectors per annulus Recommended  values:  512  for
        Classic images, 1024 for Plus images
   
    tbl_path ""
        Path to offset (mrhiy*) tables.
   
    dev = "lw20"
        Graphics output device (i.e., where to send the output plots)
   
    data_type = "vzi"
        Image data type (vzi, izi, etc...)
   
    image_type = "fits.gz"
        Image type (imh, fits, fits.gz, etc...)
   
    pm_tbl = "home$driftdrift.dat"
        Full name & path of PM data table
   
    compress = "gzip"
        Type of image compression. Choices are:  none|gzip|compress
   
    use_tc = no
        Use TC data if available?
   
    tlist = ""
        For internal use by COPIPE