mplemented advanced space astronomy research and development programs, provided program management within the Lab and acted as liaison with NASA project management at Kennedy, Marshall, Wallops and Goddard Space Flight Centers. Don semi-retired in 2000, continuing to work part-time on a wide variety of different projects for the Astronomy and other UW departments. He was currently working on the Star Tracker 5000 for NASA. Don was an enthusiastic amateur radio operator since getting his license in 1957--W9IXG. He was Wisconsin Section Manager for the American Radio Relay League (ARRL) from 1999-2015. He was very active in a number of "ham" radio groups including the Badger Weathernet. Don was also a bicyclist, happiest on a tour of Western Dane County or attending the Annual Door County Century. He also biked to and from work every day, averaging 4000 miles a year. He combined his love of amateur radio and biking by organizing support for numerous public service events throughout southern Wisconsin. Don is survived by his wife of 50 years, Ann; his daughter, Lisa Danielson (Mark) and his grandson, Mathias Danielson of Minneapolis, Minnesota; his brother-in-law, James Spanopoulos (Helen) of Chesteron, Indiana; and nephews, Frank (Sarah) Spanopoulos of Floyds Knobs, Indiana and Ed (Amy) Spanopoulos of Chesterton, Indiana. He was preceded in death by his parents and his sister, Donna Spanopoulos. A memorial service will be held at the Cress Funeral Home, 3610 Speedway Road, Madison, Wisconsin on Saturday, August 18, 2018, at 11:00 a.m. A visitation will be held at the funeral home from 10:00 a.m. until the time of service. In lieu of flowers, donations may be sent to the UW Carbone Cancer Center. https://secure.supportuw.org/give/?custom=med04&group=carbone Cress Funeral & Cremation Services 3610 Speedway Road (608) 238-3434