COLCOB

Name

colcob

Purpose

Compute the offset from the center-of-light to center-of-body.

Description

Calling Sequence

colcob,map,npix,radius,pole,selat,selon,sslat,sslon,dx,dy

Inputs

map - Array containing a full map of surface, see RENDER.PRO for a
more complete description of what's needed here.
npix - size of the array for the computation (pixels), the image used
for the computation is square and the object just fits in
the array.
radius - Radius of object in km.
pole - Position angle of pole, east from north (degrees)
selat - Sub-earth latitude (degrees)
selon - Sub-earth longitude (degrees)
sslat - Sub-solar latitude (degrees) Only used for Hapke functions.
sslon - Sub-solar longitude (degrees) Only used for Hapke functions.

Optional Input Parameters

Keyword Input Parameters

Accepts all keywords supported by RENDER.PRO. Many of these are needed
to support the proper calculation of the surface reflectance.

Outputs

dx - X position of the center-of-light in km (actually this is just
in the same units as radius but generally should be km).
dy - Y position of the center-of-light.

Keyword Output Parameters

IMAGE - Rendered image computed for calculation.
FLUX - Total flux (I/F) of the rendered image.

Common Blocks

Side Effects

Restrictions

Procedure

Modification History

1998/02/17, Written by Marc W. Buie, Lowell Observatory
2009/02/01, MWB, nearly a total rewrite both in documentation, coding, and
operation. This new version is NOT compatible with the old.