The promised memo on geomagnetic latitude distribution is available at
ftp://ftp.cithep.caltech.edu/pub/macro/latitude.ps
OR
ftp://ftp.cithep.caltech.edu/pub/macro/latitude.tar.gz
The latter is a gzipped tar archive containing LaTeX source, all
plots, the event list and C++ code for transforming between coordinate
systems. I think it should work on any C++ compiler, not just gcc.
It is preferable, but not necessary, to print the postscript file on a
color printer.
Bob