The eastward shift is actually latitude dependent, with
apparently no shift at the bottom of the grid, and about
3 degrees shift in the middle.
Lev Tarasoff - Dept of Physics, University of Toronto,
60 St. George St., Toronto, Ontario, CANADA, M5S 1A7
Tel (416)-946-3019 Fax (416)-978-8905
email: lev@atmosp.physics.utoronto.ca