hgremap (Oct00)              pipeline              hgremap (Oct00)



NAME
    hgremap -- Remap GONG images to heliographic coordinates
    
    
USAGE
    hgremap input
    
    
PARAMETERS
    
    input
        List of input solar disk images.
    
    trim_file = "pipeline$lib/plm250.sinlat"
        PLMTRIM's output ASCII triming file.
    
    offset = 90.
        Camera offset angle (degrees) measured eastward from north.
    
    pangle_cor = no
        Perform  correction  for  solar  P-angle   when   remapping   to 
        heliographic  coordinates?  Used  for  GONG  prototype and field
        data when the camera rotator is off.
    
    coude_cor = no
        Perform  correction  for  Coude  rotation  of  the  images  when 
        remapping   to   heliographic   coordinates.    Used   for  GONG 
        Breadboard instrument data.
    
    turret_cor = no
        Perform correction  for  turret  rotation  of  the  images  when
        remapping  to heliographic coordinates.  Used for GONG prototype
        and field data when the camera rotator is off.
    
    interp_type="spline3"
        Type  of  image  interpolator  to  be  used  when  remapping  to 
        heliographic  coordinates.   The   minimum   match   abbreviated 
        choices are:
        
        "nearest"
            Nearest neighbor interpolation.
        
        "linear"
            Linear interpolation.
        
        "poly3"
            Third order divided differences.
        
        "poly5"
            Fifth order divided differences.
        
        "spline3"
            Cubic spline interpolation.
        
        "sinc"
            Sinc function interpolation.
    
    geometry = "fndlmb"
        Geometry type.
        
        "fndlmb"
            Use results of gongcor.fndlmb for image center and radii.
        
        "hgeom"
            Use  results  of  Toner's  Hankel  geometry  code  for image
            center and radii.
        
        NOTE: this option will disappear once  the  Hankel  geometry  is
        included as a standard part of the upstream reductions.
    
    apod_type = "cos"
        Apodization type.
        
        "none"
            No apodization performed.
        
        "cos"
            Cosine apodization (i.e., equal area) function.
        
        "kb"
            Kaiser-Bessel apodization function.
        
        "dc"
            Dolph-Chebychev apodization function.
        
        "cb"
            Cosine-Bell (or Tuckey) apodization function.
    
    apod_par = 2.5
        Value  of  parameter  alpha for Kaiser-Bessel or Dolph-Chebychev
        apodization functions.
    
    apod_cbr = 0.75
        Apodization radius for Cosine-Bell apodization function.
    
    orientation = "counter"
        Input image orientation.
        
        "counter"
            Heliographic   west   is  counterclockwise  to  heliographic 
            North.  This is the orientation of the GONG.
        
        "clock"
            Heliographic west is clockwise to heliographic North.
    
    mask = no
        Apply moving mask

    mask_cbr = 0.01
        Moving mask radius for cosine-bell apodization.

    mask_EWrad= 0.99
        Maximum mask fractional radius in the E-W direction.

    mask_NSrad = 0.98
        Maximum mask fractional radius in the N-S direction.