I've made a graph of the TSS's perigee and apogee and period vs. time from the time it was 'deployed' from the shuttle through a couple of days ago. Neil Clifford has placed it at the seesat archive at: ftp://ftp.physics.ox.ac.uk/pub/sat/info/tss-graph.gif Philip Chien, Earth News - space writer and consultant PCHIEN@IDS.NET __ __^__ __________ | \ +---/ \---+ (========= |____\___________ +---\_____/---+ // >____)| | \__ \ \______//___ >/ |________| \ [ _____\ >|____________________\ \_______/ Roger, go at throttle up CHR$(32) the final frontier