In case you don't see, know how to view, or SeeSat-L doesn't allow attachments (I don't get my own posts, and on satobs.org I don't find a link to it) https://sites.google.com/site/starrymdnytt/dokument-och-l%C3%A4nkar/mjd%3D57767.10%20%20orbitdisplay.png?attredirects=0 -------------------------------------------------------- Björn Gimle, COSPAR 5919 59.2617 N, 18.6169 E, 51 m Satellite observation formats described: http://www.satobs.org/position/IODformat.html --------------------------------------------------------- 2017-01-24 11:00 GMT+01:00 Björn Gimle <bjorn.gimle_at_gmail.com>: > Charles posted an observation project in the restricted "So you want to > see satellites" Facebook group. It relates to possible future breakups of > DMSP 15,16,17. > > He included a map showing one position and a rather dim partial track. > > Using a recent feature at Heavens-Above I extended it to show full world > tracks, with extent of surface darkness, and sunlight and shadow along the > tracks. > > This was made as three images for 02:24 UTC Jan 24 to have surface > darkness. > I combined them with PaintShop Pro ("Lightest") > > The tracks are drawn true to the topography. So when F15 passes e.g. South > African latitude (moving southbound) some 15 minutes after the predicted > position, the distance from F15 to the morning terminator will be about > four degrees shorter, and F16 track some 15 minutes before prediction is > four degrees (400 km) further away as it passed near Cape Town. F17 will > only be in the E during dawn. > > > _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Tue Jan 24 2017 - 09:38:44 UTC
This archive was generated by hypermail 2.3.0 : Tue Jan 24 2017 - 15:38:44 UTC
