At 07:48 AM 10/29/97 +0100, you wrote: >... >>somewhere else that the SDP4 algorithm had been corrected but [again] I >>don't know where this was stated or if the updated model was described >>anywhere). >> >I believe Rob Matson, after his corrections to the SDP4 in SkyMap, tested >a geosynch elset several months old, and found excellent accuracy (improvement) > >And that Ron Lee observed some high-eccentricity objects with the same >good results. > >I hope they will reply, when they are not overloaded with work, otherwise >it should be possible to find their postings in the archives. > If someone can mention the age of the elset that is of interest, I can get one of Mike McCants archived files and check a geosynch or Molniya. Just let me know what you are interested in since I do use Rob's Skymap. With the recent addition of relatively faint stars, it is even better for telescopic obs. I need to look at some of these objects anyway so I will just pick a few objects, observe and get accurate time/position and then go back an run predictions with old elsets. So unless there is another suggestion.....that is my plan. Ron Lee