Welcome to Hat Creek Radio Observatory
A SETI Institute Research Facility
We are home to the Allen Telescope Array, the only instrument designed specifically for the purpose of conducting SETI research.
If you are interested in visiting HCRO, we are located approximately 300 miles NE of San Francisco, in Shasta County, California. A self-guided tour is available during opening hours.
Our visitor hours are:
Thursday-Friday | 9:00 AM - 3:00 PM |
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Saturday-Wednesday | Closed |
WARNING: HCRO is an active research site. Cell phone signals can interfere with ongoing operations. When you visit, cell phones and other GPS equipment must be turned off.
Full time Staff

Dr. Andrew Siemion, Bernard M. Oliver Chair For SETI Research

Dr. Vishal Gajjar, Astronomer, ATA

Dr. Alexander Pollak, Science and Engineering Operation Manager, HCRO

Dr. Wael Farah, Postdoctoral Scholar, ATA

Carol Shumaker, Site Maintenance Technician

Mark Masters, Technician
Collaborators and Consultants

Dr. David DeBoer, Management and Operations

Dr. Jack Hickish, Digital Signal Processing ATA

Derek Kozel, GNU Radio, ATA

Todd Koumrian, Software and Control, ATA

Dr. Cherry Ng, Project Scientist, COSMIC/Meerkat

Sofia Sheikh, NSF MPS ASCEND Postdoctoral Fellow
Contact: Please email info@seti.org if you have questions.