![The Gregorian Dome reflector is suspended 490 feet above the radio telescope dish of the Arecibo Observatory in Puerto Rico Stock Photo - Alamy The Gregorian Dome reflector is suspended 490 feet above the radio telescope dish of the Arecibo Observatory in Puerto Rico Stock Photo - Alamy](https://c8.alamy.com/comp/2CCBG5C/the-gregorian-dome-reflector-is-suspended-490-feet-above-the-radio-telescope-dish-of-the-arecibo-observatory-in-puerto-rico-2CCBG5C.jpg)
The Gregorian Dome reflector is suspended 490 feet above the radio telescope dish of the Arecibo Observatory in Puerto Rico Stock Photo - Alamy
![Photograph of the DVA-C prototype. The DVA-C is an offset Gregorian... | Download Scientific Diagram Photograph of the DVA-C prototype. The DVA-C is an offset Gregorian... | Download Scientific Diagram](https://www.researchgate.net/publication/308738318/figure/fig9/AS:411964728725506@1475231453514/Photograph-of-the-DVA-C-prototype-The-DVA-C-is-an-offset-Gregorian-dual-reflector.png)
Photograph of the DVA-C prototype. The DVA-C is an offset Gregorian... | Download Scientific Diagram
SETI Institute - The SETI Institute is exploring a collaboration with the Arecibo Observatory (AO) in Puerto Rico to deploy an Antonio Feed in AO's Gregorian dome to conduct SETI observations. The
![The Gregorian Dome reflector and delay line feed antenna is suspended 490 feet above the radio telescope dish of the Arecibo Observatory in Puerto Ric Stock Photo - Alamy The Gregorian Dome reflector and delay line feed antenna is suspended 490 feet above the radio telescope dish of the Arecibo Observatory in Puerto Ric Stock Photo - Alamy](https://c8.alamy.com/comp/2CDB399/the-gregorian-dome-reflector-and-delay-line-feed-antenna-is-suspended-490-feet-above-the-radio-telescope-dish-of-the-arecibo-observatory-in-puerto-ric-2CDB399.jpg)