You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>MOPEX</strong> User’s <strong>Guide</strong><br />
negative number to avoid including input images that have only marginal overlap with the<br />
FIF.<br />
OUTPUT<br />
Generated Headers List Table (header_list.tbl): This file lists the World Coordinate<br />
Systems (WCS) information from each of the BCD image headers. The information is used to<br />
make the Fiducial Image Frame table.<br />
Generated FIF Table (FIF.tbl): This text file is used by later modules for putting together a<br />
mosaicked image with specified pixel size, orientation and the final image size. The module<br />
overwrites any input FIF table specified in the Initial Settings. Note that the output mosaic<br />
will always use the set of keywords CDELT1, CDELT2 and CROTA2, even if the input<br />
images use the CD matrix convention.<br />
The outputs of this module are written to the top output directory specified in the Initial<br />
Settings.<br />
DISCUSSION<br />
This module creates a table specifying a unified coordinate system and the spatial boundaries<br />
of the output mosaic. This table is required for any interpolation or mosaicking using<br />
<strong>MOPEX</strong>. If this module is not included, an existing FIF table has to be specified in the Initial<br />
Settings to enable later modules to run. After this module is run once, the output FIF table can<br />
be modified manually if desired, and used as input to subsequent runs (this is useful for e.g.<br />
mosaicking small sections of a large dataset - see §5.3 for more details).<br />
Even if the input images use the CD matrix convention, the output mosaic images (and by<br />
extension the interpolated images) will use the set of keywords CDELT1, CDELT2 and<br />
CROTA2, since the mosaic image is undistorted.<br />
If you plan to use the MIPS "mosaic" PRFs that are provided for PRF fitting on your mosaic,<br />
your mosaic must be built in the same way as the ones used to derive those PRFs, that is,<br />
from BCDs that have nearly the same orientation (close in time or taken at the same time of<br />
year) and with a CROTA2 angle that is properly aligned with the BCDs (Use average input<br />
orientation is recommended). All other cases would require you to make your own PRF from<br />
your mosaic.<br />
Mosaicking (mosaic.pl) 59<br />
Mosaic Modules
Change language