At 11:43 7/06/01 , you wrote: >Typically, how often are geosychronous TLE's (and other satellites in >even higher orbits of low eccentricity) updated? To give an example taken from OIG only a couple of minutes ago. The Last five TLE's for Superbird A ( #20040 ) span epochs from day 143.8 to 155.8 I delibrately chose a non-opertational satellite With regard to IMP-8 . I imagine US SPACECOM has decided that IMP-8 will not ever come within the geosat distance, and therefore there is no point in tracking it given finite resources available to them. They have obviously made the same decision about satellites WIND and GEOTAIL, both active satellites returning data, whose positions are available from the NSSDC space physics site. 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 : Wed Jun 06 2001 - 19:41:21 PDT