The ellipse rotation angle. A counter-clockwise rotation of the y axis to the ellipse major axis is a positive angle. Units are degrees. 1.0.LE.PCR.LE.1000.0 rot Rotation angle. A positive rotation angle corresponds to a counter-clockwise rotation of the input image in sky coordinates.
Units are degrees.
The output image header is copied from the input image header. The output image header contains the output limb ellipse parameters and the output pixel size parameters from the input parameters. Assume that stretching is only radial and that radial shift of a point within the ellipse is proportional to the radial shift of the point at the limb. Using the mapping function, the output image is obtained by bicubic interpolation of the input image.