Someone mailed a response suggesting that it might be interesting to see an Iridium flare plotted. I don't have an image of my own but I selected one from the many available on the Internet. To avoid any copyright/ownership issues, I will not identify the original. The result is here: http://www.zarya.info/Results/iridiumplot.jpg The curve is pretty symmetrical and it has spikes caused by stars on the line of the trail. The flat top is caused by the image saturating around the brightest point. Like the ISS curve, there is a step to the right on the peak but having looked closely at the original image, it is a genuine feature in that the rise and fall are not quite symmetrical. The step may be a processing aretefact that can be avoided by more-careful processing than my quick dabble. Bob Christy > -----Original Message----- > From: Bob Christy [mailto:rdc@zarya.info] > Sent: Wednesday, January 09, 2008 7:52 PM > To: Seesat-L > Subject: Light Curve from Satellite Trail > > As an experiment, I set out to derive a light curve from a > trailed image of the ISS. It worked quite well: > http://www.zarya.info/Tracking/ISS/20070812vis.php > > BobChristy > Lincoln, UK > 53.2233 deg North > 0.6004 deg West > Height 59m No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.19.0/1216 - Release Date: 09/01/2008 10:16 ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
This archive was generated by hypermail 2b29 : Thu Jan 10 2008 - 10:03:49 UTC
