"I look forward to the first program that comes out that uses the latest SGP4/SDP4 code that was put on the Internet in August 2006." Where is that code, if I may ask? Incidentally, can anyone point me to comparisons of the full models versus simple precessing ellipses? I understand I can expect ground track errors of a couple of tenths of a degree in simple cases, but is it ever worse? Isn't element age a bigger issue than all these subtleties of models? -FER 42.0N 87.7W, or 41.4N 72.1W. www.HistoricalAtlas.com/lunars ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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