On the Search for Extra Terrestrial Intelligence (SETI): A Geographically-spaced Synchronized Signal Detection System


Pesentation by
William J. (Skip) Crilly Jr 
Education and Public Outreach Volunteer Science Ambassador 
Green Bank Observatory, West Virginia

  Date and Time




  • Safari Room, The Davenport Tower
  • 111 S Post St E
  • Spokane, Washington
  • United States 99201

Staticmap?size=250x200&sensor=false&zoom=14&markers=47.6562617%2c 117
  • Starts 15 March 2018 09:55 AM
  • Ends 03 April 2018 11:55 PM
  • All times are US/Pacific
  • 3 spaces left!
  • No Admission Charge
  • Register


William J. (Skip) Crilly Jr

William J. (Skip) Crilly Jr


A Geographically-spaced Synchronized Signal Detection System

A system has been designed and implemented that makes simultaneous geographically spaced time-and-frequency-synchronized measurements of hypothetical extraterrestrial narrowband signals in the 1405-1448 MHz band. One radio telescope is the Sixty Foot Deep Space Exploration Society Plishner Telescope in Haswell, Colorado, and the second radio telescope is the Forty Foot Telescope in Green Bank, West Virginia. A GPS-signallocked reference oscillator and a digital back-end is used at each site to permit differential Doppler measurements to a precision of +-1.8 Hz. This presentation will describe the system, observations of simultaneous close-frequency pulses, and future plans to enhance capabilities of the system.


Skip currently contributes to telescope development, science and education as a part-time volunteer engineer at the Green Bank Observatory. Skip develops systems, hardware and software for astronomical observations and the Search for Extraterrestrial Intelligence, for the Green Bank Telescope, the world’s largest fully steerable telescope, the Forty Foot Telescope at Green Bank, and the Paul Plishner Deep Space Exploration Society Sixty Foot Telescope near Haswell, Colorado.
Previous work experience includes approximately ten years as Chief Technology Officer at Cellular Specialties, Inc. five years as co-founder, CTO and Chief Scientist at Vivato, and instrument R&D engineering and management positions during a twenty-seven year career at Hewlett-Packard Co.
Skip has a BSEE from Case Western Reserve University and was raised by American parents in the Philippines. Skip is also a member of IEEE.


5:30 pm: Doors open

6:00 pm: Dinner orders

6:20pm: Presentation

*Please note that this is a non-hosted event, i.e., food and beverages will be available for purchase at the expense of the attendee. Food and beverage purchase is welcome, but not required for event attendance.