CRESCIT(1)

NAME

     crescit -  how much a MDI Data  Product  grows  when  it  is
     reconstructed

SYNOPSIS

     crescit DPC

DESCRIPTION

     crescit provides an estimate  of  the  expansion  factor  by
     which  a  data  file  for  a  particular  MDI  Data  Product
     corresponding to the given DPC will grow when  reconstructed
     to two-dimensional image format.

EXAMPLES

FILES

SEE ALSO

     imgrecon(1), dpdc(1)

DIAGNOSTICS

BUGS

     The expansion factor for a dataset is based  solely  on  the
     increase  in  the data size and takes no account of overhead
     in FITS headers and extra non-data files in  the  directory.
     It  is  therefore always an overestimate, and for small data
     sets sometimes a large overestimate.

     The expansion factors  for  non-standard  crops  are  merely
     rough  approximations  based  on the radius ratio, not exact
     pixel counts.  Only the standard  Structure  Program  binned
     products  are  supported;  non-standard binnings (6001-6006)
     could be slightly off,  but  so  far  none  are.   For  Limb
     Annulus  crops,  the smallest standard crop is used, so that
     the result is an upper bound on the expansion factor.

AUTHOR

     Rick Bogart

HISTORY

     1996-07-31      SOI Version 1.0