ATMs, I've had some queries regarding downloading MIL-HDBK-141 from my web site. Apparently some are unable to get a complete download of the parts. I've divided the book into smaller, although still somewhat large, pieces. It's available at: http://www.azmackes.net/astronomy/mil_hdbk_141/index.html Let me know if you have trouble. Joe -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.