Hi, I have used both PocketSat and PocketSat+ written by Jim Berry @ _www.bigfattail.com_ (http://www.bigfattail.com) . Jim has windows mobile version and also a version for use with a Palm operating system. The software has proved to be most useful especially when operating portable for example with an Arrow Antenna and a HT. The software is also listed on the Amsat web pages. Good luck and enjoy! Ken Eaton GW1FKY Amsat- UK Amsat NA