Op 18-8-2011 14:17, Marco Langbroek schreef: >> Op 17-8-2011 13:49, alain.figer@club-internet.fr schreef: >> >> In all the photos, a same flashpattern seems rather obvious : 1 bright maximum >> followed by 2 secondary maxima. > > > With only two exceptions (where secondary peaks are missing/not pronounced), if > I take each third peak in the sequence, I get a period of 0.73 +- 0.03 seconds, > exactly what you found. > [snip] > secondary maxima tend to have intervals of about 0.27s and 0.46s Looking at it closely, and trying some fits, it looks like that in my 14 Aug image #9 brightness diagram, all peaks (main and secondary/tertiary) fit an approximate ~0.24s to ~0.25s periodicity. The main peaks at 0.73s (all pronounced) are in most instances followed by a peak ~0.24s later (other than in Alain's images, where they are more clearly secondary, sometimes also quite pronounced), and in a few cases also preceeded by a peak ~0.24s earlier. Where the latter is missing, you get a ~0.48 s gap. See diagram here: http://sattrackcam.blogspot.com/2011/08/nanosail-d-pattern-in-chaos.html - Marco ----- Dr Marco Langbroek - SatTrackCam Leiden, the Netherlands. e-mail: sattrackcam@wanadoo.nl Cospar 4353 (Leiden): 52.15412 N, 4.49081 E (WGS84), +0 m ASL Cospar 4354 (De Wilck): 52.11685 N, 4.56016 E (WGS84), -2 m ASL SatTrackCam: http://home.wanadoo.nl/marco.langbroek/satcam.html Station (b)log: http://sattrackcam.blogspot.com ----- _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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