Welcome!

The Hat Creek Radio Observatory (HCRO) is located in Hat Creek, California and is home of the Allen Telescope Array (ATA).
HCRO History...

The ATA is a joint project between the SETI Institute and the Radio Astronomy Lab. The ATA is currently under construction. When completed, the array will consist of 350 six meter (~20ft) diameter telescopes observing radio frequencies between 327 MHz (91 cm wavelength) and 11.5 GHz (2.6 cm) with possible expansion up to 25 GHz (1.2 cm).
Construction photos...

Feel free to come visit us, there should be someone around to show you a video, and time permitting, give you a more extensive tour. Larger groups may want to schedule in advance so that we can allocate time to showing you around. Just remember to keep your cell phones off and sign our guestbook!
Directions...