It may be connected with rotation of the Line of Apsides (the line joining perigee and apogee) in the orbit plane. However, I don't see it in the elements for the satellite, Navid. There is an example of the effect of this rotation on the Tiangong 1 orbit here: http://www.zarya.info/Diaries//China/Shenzhou/Tiangong1.php#ecc . It can also be seen influencing the apogee and perigee plot to be found further up the page. It is a spin-off from variation in the true heights of the orbit above the Geoid. They can differ significantly from the Twoline-derived numbers by an amount dependent on the orientation of the Line of Apsides. Bob Christy On 07/02/2012 15:44, Joseph Remis wrote: > Could somebody explain the evolution of the eccentricity of the orbit of > SAFIR 2 R/B OBJ. 38076 ? > It grows regularly. > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: http://mailman.satobs.org/mailman/private/seesat-l/attachments/20120207/9fc2a162/attachment.html > _______________________________________________ > Seesat-l mailing list > http://mailman.satobs.org/mailman/listinfo/seesat-l > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2012.0.1913 / Virus Database: 2112/4793 - Release Date: 02/06/12 > > _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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