I've quickly put together a couple of screen shots at http://www.wiseoldcat.com/?q=node/26 As it is now the program keeps the display points in a ring buffer, currently of size 10, so what you see on the screen are the last 10 positions of the object in a train of circles with the current point displayed as a cross. The size is dependent on the calculated apparent magnitude (using the Molczan definition) using the qsat.mag and mcnames.txt data. If you hover the mouse within a certain distance of an object it will write details of the object to a textbox in the parent form and display (sometimes) a popup tooltip on the graphics form showing the name, mag, and distance. If you right/left click on the graphics it will zoom in/out and the limiting mag of the star background changes from 4 to 8 depending on the zoom factor. As it is right now the software only does realtime mode. There are no input dialogs for observer location and such, you would have to edit an xml config file to change that. It still is very much a work in progress. To do what you are talking about would involve playing with the orbital elements themselves and keeping a parallel set of display points? Without going back over the SGP calcs would it be as simple as changing the epoch? Certainly possible to do. I'll try to make a copy of it available in the next week. What I really want at this stage is some feedback on how accurate the display is. On 3/6/2015 1:21 AM, Marco Langbroek via Seesat-l wrote: > Greg Roberts via Seesat-l schreef op 6-3-2015 om 8:51: > >> One thing I would like to see in software that I have not seen yet is the >> ability to display a satellite track against star background as a function of >> the error in the prediction - i.e if the satellite is expected to be say 10 >> minutes early then display this track as well as the predicted track - in fact >> it would be nice if the time offset could be something requested by the program >> whilst observing. > > I second this: this would be very useful. Cees' software can do this but it > runs under Linux. > > - Marco > > > ----- > Dr Marco Langbroek - SatTrackCam Leiden, the Netherlands. > e-mail: sattrackcam_at_langbroek.org > > Cospar 4353 (Leiden): 52.15412 N, 4.49081 E (WGS84), +0 m ASL > Cospar 4355 (Cronesteyn): 52.13878 N, 4.49937 E (WGS84), -2 m ASL > Station (b)log: http://sattrackcam.blogspot.com > Twitter: _at_Marco_Langbroek > ----- > _______________________________________________ > Seesat-l mailing list > http://mailman.satobs.org/mailman/listinfo/seesat-l _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Fri Mar 06 2015 - 08:50:57 UTC
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