At 22:53 7/04/00 , Bruno Tilgner wrote: >This morning (Friday 7 April, around 9:00 UTC) I downloaded from OIG >the latest TLEs for XMM. What surprises me is that they are from >day 99, i.e. 8 April. Are they the result of an extrapolation or has >OIG not noticed that we had a 29 February ? Bruno, this sort of thing turns up in the TLe's for anything that has a period much greater than one day. US SPACECOM just updates the elements to the time of the next equatorial crossing, whether this is in the future at the time or not. it shows up in the chandra tle's too, and caused some wierd ordering of tle's while chandra was getting to its final orbit, with the aid of its rocket engine. Tony Beresford ----------------------------------------------------------------- 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
This archive was generated by hypermail 2b29 : Fri Apr 07 2000 - 06:56:12 PDT