The Haystack Radio Telescope is a parabolic antenna protected by a metal-frame radome. It is known as the Haystack Long-Range Imaging Radar or Haystack Ultrawideband Satellite Imaging Radar when used for the LSSC. It was constructed for use in space tracking and communication, but now is used primarily for astronomy. It was completed in 1964 and originally observed at 8 GHz on the radio spectrum. Since then it has been upgraded to listen to other frequency bands, though not simultaneously. When used for radar it broadcasts and listens in bands at either 10 GHz or 95 GHz. The main dish was upgraded in 2006, which allowed operation at frequencies up to 150 GHz. The secondary reflector of the Cassegrain design features an active surface.
Haystack Radar operations
The Long-Range Imaging Radar system was originally designed to function as an X-band long-range imaging radar. In wideband mode, LRIR runs at 10 GHz with a 1.024 GHz bandwidth. The system was capable of sensitivity of 25 cm resolution, allowing for tracking and imaging satellites out to geostationary orbit distances, as well as deep space objects out to range. The radar was upgraded with a completely new antenna capable of dual-band operations, called Haystack Ultrawideband Satellite Imaging Radar . The system is capable of simultaneous operations in X band and W-band, which allows it to better determine the size, shape, orientation, and motion of orbiting objects. The HUSIR design allows for tracking object with 0.5 millidegree accuracy. The W-band operates between 92 and 100 GHz, with a bandwidth of 8 GHz. The system contributes data to the United States Space Surveillance Network.
Haystack Auxiliary Radar
The Haystack Auxiliary Radar is Ku-band system with a dish antenna. It was constructed in 1993 to augment the LSSC imaging and data collections space debris. It contributes data to the SSN.
Westford Radio Telescope
The Westford Radio Telescope was built in 1961 by Lincoln Laboratory for Project West Ford as an X-band radar antenna. It is located approximately south of the Haystack telescope along the same access road. The antenna is housed in a radome and has an elevation-azimuth mount. Since 1981, it has been used primarily for geodeticvery long baseline interferometry. By measuring the location of astronomical radio sources very accurately, geodetic VLBI techniques can be used to measure things such as changes in the axial tilt of the Earth.
Haystack serves as a computational hub for the Event Horizon Telescope, an assemblage of radio telescopes around Earth that combine data for very-long-baseline interferometry to achieve angular resolution capable of imaging a supermassive black hole's event horizon. Data are transported on large hard drives from the observing telescopes to Haystack, where a cluster of about 800 CPUs run algorithms to produce black hole imagery. The computation has been termed a "silicon lens", as each the data from each telescope is useless by itself and must be computationally combined to produce an image.
Former telescopes
The Deuterium Array was a 25-element radio telescope array optimized to observe at 327 MHz, which is one of the emission lines of deuterium. Each element, or station, was itself a 25-element array of dipoles. The array operated from 2004 to 2006.
Millstone Hill Observatory
Millstone Hill Observatory is a Massachusetts Institute of Technology atmospheric sciences research centre in Westford, Massachusetts. It is part of Haystack Observatory, which focuses primarily on radio astronomy. Millstone Hill is the location for two of the most well-known incoherent scatter radars in the world. These include a fully steerable 46-meter antenna called Millstone Hill Steerable Antenna, and a 67-meter fixed-zenith antenna. These radars are capable of measuring a vast array of ionospheric components, including temperature, ion concentrations and solar wind data. Data from Millstone Hill is publicly available on the MADRIGAL database, an upper atmosphere data system managed by MIT Haystack.
The Millstone Hill Steerable Antenna is a fully steerable UHF antenna. Built in 1963, the system was initially installed at the Sagamore Hill Air Force facility in Hamilton, Massachusetts, relocated in Millstone Hill in 1978. It is primarily used as a space surveillance system using incoherent scatter radar techniques.
Zenith Antenna
The Zenith antenna was constructed in 1963 to use with the UHF transmitter. The radar system has been previously connected to another steerable 84-foot antenna. When the steerable antenna that was converted to L-band, the Zenith system was dedicated exclusively to incoherent scatter observations.
Directors
Paul B. Sebring was the Haystack Observatory's director from 1970 to 1980. From 1980 to 1983 John V. Evans was the director. Joseph E. Salah was the director from 1983 to 2006, Alan R. Whitney was the interim director from 2006 to 2008, and Colin J. Lonsdale became the director on 1 September 2008.
Exhibits
The ''Sun Drawing'' Exhibit
The Sun Drawing art exhibit at the Haystack Observatory was conceived and developed as part of the Global Sun Drawing Project by visual artist Janet Saad-Cook. "Sun Drawings" are projected images created by reflecting sunlight from a variety of materials that are strategically positioned to relate to their specific location on earth. The reflections change shape and color in relation to the position of the sun, creating a four-dimensional artwork of varying reflections throughout the day and year. Similar installations for the Global Sun Drawing Project have been planned at other astronomically significant locations worldwide, including an exhibit at the Karl G. Jansky Very Large Array in New Mexico.
