Carl Akerlof (UM Physics). “Radio Astronomy on the Roof – Two Undergrad Experiments in Astrophysics & Cosmology.”
For a summary of this talk, see: Dave Snyder. (March 2015). “Lowbrow Meeting Minutes February 20, 2015, 7:30 PM.” Reflections of the University Lowbrow Astronomers, p. 8. [Here]