NAME

       mRotate - Rotate a FITS image by an arbitrary angle

SYNOPSIS

       mRotate [-d level] [-s statusfile] [-r rotang] in.fits out.fits [ra dec xsize [ysize]]

DESCRIPTION

       Rotates  a FITS image by an arbitrary angle.  This module is meant for quick-look only; it
       is not flux conserving.

OPTIONS

       -d level
              Print out additional debugging information (level can be 1-3)

       -s statusfile
              Output and errors are written to statusfile instead of stdout.

       -r rotang
              Provide an angle (in degrees) to rotate the image.

ARGUMENTS

       in.fits
              Input FITS image.

       out.fits
              Path to output (rotated) FITS image.

       ra dec xsize
              Center location and width (in degrees) of output image  -  optional.   By  default,
              entire input image area will be included in output image.

       ysize  Height  (in  degrees)  of  output  image,  if  a  new center location and width are
              provided.  Optional - defaults to xsize.

RESULT

       [struct stat="OK"]

       Output file will contain the same image as the input file, but rotated by rotang  degrees.
       If  a new center location and width were provided, the output image will be the "subimage"
       covering that area.

MESSAGES

       OK     [struct stat="OK"]

       ERROR  No status file name given

       ERROR  Cannot open status file: statusfile

       ERROR  No rotation angle given

       ERROR  Rotation angle string is invalid: 'rotang'

       ERROR  No debug level given

       ERROR  Debug level string is invalid: 'level'

       ERROR  Debug level value cannot be negative

       ERROR  Invalid input file 'in.fits'

       ERROR  Invalid output file 'out.fits'

       ERROR  Center RA string (ra) cannot be interpreted as a real number

       ERROR  Center Dec string (dec) cannot be interpreted as a real number

       ERROR  X size string (xsize) cannot be interpreted as a real number

       ERROR  Y size string (ysize) cannot be interpreted as a real number

       ERROR  Invalid 'x' size

       ERROR  Invalid 'y' size

       ERROR  Location is off image

       ERROR  No pixels match output area

       ERROR  No pixels match input area

       ERROR  wcsinit() failed

       ERROR  Image file in.fits missing or invalid FITS

       ERROR  FITS library error

EXAMPLES

       $ mRotate -r 90 in.fits out.fits
              [struct stat="OK"]

BUGS

       The drizzle algorithm has been implemented but has not been tested in this release.

       If a header template contains  carriage  returns  (i.e.,  created/modified  on  a  Windows
       machine),  the cfitsio library will be unable to read it properly, resulting in the error:
       [struct stat="ERROR", status=207, msg="illegal character in keyword"]

       It is best for the background correction algorithms if the area described  in  the  header
       template  completely encloses all of the input images in their entirety. If parts of input
       images are "chopped off" by  the  header  template,  the  background  correction  will  be
       affected.  We  recommend  you  use  an expanded header for the reprojection and background
       modeling steps, returning to the originally desired header size for the final  coaddition.
       The default background matching assumes that there are no non-linear background variations
       in the individual images (and therefore in the  overlap  differences).  If  there  is  any
       uncertainty  in  this  regard, it is safer to turn on the "level only" background matching
       (the "-l" flag in mBgModel.

COPYRIGHT

       2001-2015 California Institute of Technology, Pasadena, California

       If your research  uses  Montage,  please  include  the  following  acknowledgement:  "This
       research  made use of Montage. It is funded by the National Science Foundation under Grant
       Number ACI-1440620, and was previously  funded  by  the  National  Aeronautics  and  Space
       Administration's  Earth Science Technology Office, Computation Technologies Project, under
       Cooperative Agreement Number  NCC5-626  between  NASA  and  the  California  Institute  of
       Technology."

       The  Montage  distribution  includes an adaptation of the MOPEX algorithm developed at the
       Spitzer Science Center.