Hi Jim, Is this what you are looking for? ftp://ftp.amsat.org/amsat/telemetry/ao40/ 73, Mark N8MH ___ I'm looking for an online repository of AO-40 housekeeping telemetry for a space weather study. May I ask for any pointers to such a database? Jim jim at coloradosatellite.com wd0e at amsat.org Mark L. Hammond [N8MH]