Bill Krosney <bkrosney@MBnet.MB.CA> wrote: > >I am unfamiliar with Alphonse's MirViz, but I have tried Rob Matson's >SkyMap. It does great star maps....but does it do orbital planes? >.... It is not the satellite's trajectory >(i.e. where on Earth does it overfly over a period of time) but rather >the orbital plane at a single instant of time. > Sorry, I missed your point there. SkyMap does orthographic projection of the globe(map) and the actual orbit. If I remember correctly, MirViz also does the ground track, and vertical lines to the orbit. >..... In between >the orbital plane of Mir did pass directly over KSC, you can only guess at >the time. Only if Mir itself happens to pass directly over KSC do you >know when Mir's orbital plane passes over. > If you use the Mercator projection of TrakSat, you can measure the longitudinal difference between the track and the site, and convert it to time. ------------------------------------------------------------ -- b_gimle@algonet.se +46-8-7428086 (home) -- -- 59.22371 N, 18.22857 E AND member of : -- -- http://www.algonet.se/~b_gimle seesat-l / seesat-d -- -- bjorn@tt-tech.se +46-8-59095783 (office)-- ------------------------------------------------------------