           sufficient.
 
            4)  The boundary field of view vector returned from `<a href="getfov_c.html">getfov_c</a>'
                is associated with a boundary field of view pixel. If
                this example were extended to include a geometric camera
                model, this assumption would not be needed since the
                direction vectors associated with each pixel would be
                calculated from the geometric camera model.
 
         Use the meta-kernel shown below