Thanks Denis- indeed most programs that are capable of searching for transits are observer-oriented, and so don't produce ground tracks. The angular size of Venus on June 8 will be about 58", and for a 63° elevation transit of Venus, the 73 meter width of the main solar panels corresponds to about 37" (if oriented perpendicular to the line of sight, as Mike Tyrrell and Phil Masding's ISS VRML simulator suggests may nearly be the case, at least in some places), or about 2/3 the size of Venus. Your results therefore match mine basically to the size of the ISS itself, which means that "improved" accuracy (except for using accurate values for the local elevation above sea-level) may be quite pointless, since it's unlikely that the TLE available on June 7 will be able to locate the ISS's center of mass to better than 73 meters- or even anything particularly close to 73 meters... I'll pass along the link to your program, for anyone that may be interested: http://www3.telus.net/public/boucherd/main.htm ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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