Dear colleagues, here is the list of changes for IODB_0053: - new TM parameter (JS2000 - JS2030) - number of check for OOLs changed from 1 to 2 (E2101 - E2116, E3500, E3825, E3826, E3828 - E3831, G6061) - several TM parameter changes to correct SCC issue - GRD scale change - synthetic parameter fix - new OBM / RACP entries - several TM parameter & description changes What I can see here is that your latest version of the db is IODB_0051 from Feb 2007. Greetings, René -------------------------------------------------------------------+- René Lemme Telespazio Deutschland GmbH Provision of Spacecraft Operations Services ESA - ESOC Robert-Bosch-Strasse 5 64293 Darmstadt - Germany Tel: +49 (0) 61 51-90 21 43