Arithematical manipulations.

add	adds Ultracam frames
addaframe	adds a frame to a list of frames
addbad	adds new bad pixels to a bad pixel frame
backsub	subtracts the background off an Ultracam frame
badgen	generates bad pixel frames
boxavg	averages an Ultracam frame in boxes
boxmed	medians an Ultracam frame in boxes
bsub	subtracts a frame from multiple Ultracam frames
cadd	adds constant to an Ultracam frame
cdiv	divides an Ultracam frame by a constant
cmul	multiplies Ultracam frames
collapse	collapses Ultracam frames
combine	combines a set of frames using median or clipped mean
crop	crops Ultracam frames
cset	sets an Ultracam frame to a constant
csub	subtracts a constant from an Ultracam frame
div	divides Ultracam frames
dsub	subtracts a drak frame from multiple Ultracam frames
expand	expands Ultracam frames
list	lists pixels with a specified range of values
makeflat	makes a series of frames into a flat field.
mdiv	divides a frame into multiple Ultracam frames
msub	subtracts a frame from multiple Ultracam frames
mul	multiplies Ultracam frames
mulaframe	multiplies a list of frames by one frame
sub	subtracts Ultracam frames
sumframes	adds a list of frames together
uset	sets/splices Ultracam frames
window	windows Ultracam frames