The routine adds two NDF
pixel-by-pixel to produce a new NDF.
add in1 in2 out
IN1 = NDF (Read)
First NDF to be added.
IN2 = NDF (Read)
Second NDF to be added.
OUT = NDF
Output NDF to contain the sum of the two input NDFs.
TITLE = LITERAL (Read)
The title for the output NDF. A null value will cause the title of the NDF supplied for
Parameter IN1 to be used instead.
add a b c This adds the NDF called b to
the NDF called a, to make the NDF called c. NDF c inherits its title from a.
in1=a in2=b title="Co-added image" This adds the NDF called b to the NDF called a, to
make the NDF called c. NDF c has the title
If the two input
NDFs have different pixel-index bounds, then they will be trimmed to match before being
added. An error will result if they have no pixels in common.