def make_chunks(segment, length, overlap=0):
"""
Divides the science segment into chunks of length seconds overlapped by
overlap seconds.
when generating chunks
"""
chunks = []
for iseg in segment:
segtemp = SegmentList([iseg])
time_left = abs(segtemp)
start = segtemp.extent()[0]
increment = length - overlap
while time_left >= length:
end = start + length
chunks.append(Segment(start, end))
start += increment
time_left -= increment
return SegmentList(chunks)
