RECOGNIZING THE BIG HORN ANTENNA AND PROJECT ECHO WHAT IS THE “HOLMDEL HORN ANTENNA”? The Holmdel Horn Antenna is a large microwave (https://en.wikipedia.org/wiki/Horn_antenna) that was used as a (https://en.wikipedia.org/wiki/Satellite_communication) antenna and (https://en.wikipedia.org/wiki/Radio_telescope) during the 1960s at the (https://en.wikipedia.org/wiki/Bell_Telephone_Laboratories) facility located on (https://en.wikipedia.org/wiki/Crawford_Hill) in (https://en.wikipedia.org/wiki/Holmdel_Township,_New_Jersey), United States.(https://en.wikipedia.org/wiki/Holmdel_Horn_Antenna#cite_note-Crawford-5) It was designated a (https://en.wikipedia.org/wiki/National_Historic_Landmark) in 1989 because of... Read more →