This is a port of SatTrack version 3.1, which is Copyright (c) 1992-1997 Bester Tracking Systems. All Rights Reserved. SatTrack is a real-time satellite tracking and orbit propagation program with an X11 color world map tracking chart. It provides two different live displays, for single or multiple satellites, and two different orbit prediction modes. Cursor controls used in the numerical live displays are compatible with the VT100 standard, which allows the program to be run basically from any terminal without the graphics display. If the program is run from an X Window terminal, the realtime graphics display can be started up. It will show the location of any number of specified satellites like the Space Shuttle or the Russian Space Station Mir, featuring the circle of visibility for any selected spacecraft and for the primary and a number of secondary ground stations. Also shown are the ground track for the next three orbits, the black-out zones for communication through the TDRSS network, Mission Elapsed Time (MET), the terminator, spacecraft lighting conditions and other details. The world maps are provided in two different styles with four different sizes each. Program SatTrack is particularly interesting for the upcoming Shuttle - Mir rendezvous missions. Current on-line information on SatTrack can be found on the World Wide Web page with the following URL: http://www.bester.com The much advanced commercial off-the-shelf version of SatTrack (V4.0) can be obtained from Bester Tracking Systems. Port to FreeBSD 2.2 by Brent J. Nordquist Sun Mar 2 1997