http://www.kernschatten.info/mar07/tle-030307.htm
http://www.pbase.com/sabbilsel/tle2007
Obviously there are large fluctuations in the measurements due to change in image exposure settings and possibly light cloud,
however the overall effect is that the umbra increases in size to totality and then decreases toward fourth contact as shown by the black trend line.
Produced by the Theodore Lunar Observatory Australia 2007 March 22.