address: 1. http://mason.gmu.edu/~jmontana/syllabus.html - useful links - Lloyd's SatlConstel - view from satellite (The Earth as viewed......) - choise of satellite - ... -info needed before (Information Needed...).. - it is possible to find various information without registration - 2. ORBITRON - system for tracking satellites - for amateurs - description on: http://www.vesmir.sk/?id=soft_orbitron - download from: http://www.stoff.pl/downloads.php - see also info on this page; it is needed to download also actual tle.zip subor (data abou all satellites) and unpack by recommendations 3. FAQ - that is glossary actually http://www.sasltd.com/T/faq/index.html#d