Looks like our tracking may be destined to become more challenging in the future: http://www.eurekalert.org/releases/ns-aof102799.html "With today's satellites, it is easy for an enemy to predict the craft's position, unless it changes course. But course changes use up the satellite's limited supply of hydrazine fuel and shorten its life. With a steady supply of fuel available to their satellites, controllers will be able to manoeuvre them at will, making their orbits more difficult to predict." Ted Molczan ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www2.satellite.eu.org/seesat/seesatindex.html