The papaer was revised just today for typos.
The current version
http://www.aoc.nrao.edu/~egreisen/scs_050524.ps
is best reached via my home page
http://www.aoc.nrao.edu/~egreisen/
or the generic names
http://www.aoc.nrao.edu/~egreisen/scs.ps
http://www.aoc.nrao.edu/~egreisen/scs.ps.gz
http://www.aoc.nrao.edu/~egreisen/scs.pdf
Eric Greisen