Subreflector: 8-m reflector with Stewart Platform (6 degrees of freedom).Receiver mounts: Prime: Retractable boom with Focus-Rotation Mount Gregorian: Rotating turret with 8 receiver bays.Available Foci: Prime and Gregorian f/D (prime) = 0.29 (referred to 208 m parent parabola) f/D (prime) = 0.6 (referred to 100 m effective parabola) f/D (Gregorian) = 1.9 (referred to 100 m effective aperture).
Optics: 110 m x 100 m unblocked section of a 208 m parent paraboloid Offaxis feed arm.The operational funding provided by the NSF is approximately 0.1% of the NSF astronomy budget.The GBT operates 24 hours/day, 362 days/year.The GBT’s collecting area is 2.34 acres and its diameter is 300 feet.The GBT weighs almost 17 million pounds and stands over 485 feet above ground level.The pointing accuracy of the GBT is 2 arc seconds, able to resolve a quarter at 3 miles.The surface of the GBT is perfectly smooth to a noise level of 260 microns (5 human hairs).More than $25,000,000 has been invested in the GBT in the past five years by colleges, universities, the NSF, and the state of West Virginia.More than 600 individual scientists and students proposed to use the GBT within the past year.For each hour of time available for science on the GBT, roughly 3-4 hours are requested.The GBT is running observations roughly 6,500 hours each year, more than any other observatory.Facilities of the Green Bank Observatory are also used for other scientific research, for many programs in education and public outreach, and for training students and teachers. The GBT is also readily reconfigured with new and experimental hardware, adopting the best technology for any scientific pursuit. It is scheduled dynamically to match project needs to the available weather. Part of the scientific strength of the GBT is its flexibility and ease of use, allowing for rapid response to new scientific ideas. Its operation is highly efficient, and it is used for observations about 6500 hours every year, with 2000-3000 hours per year available to high frequency science. Because the GBT has access to 85% of the celestial sphere, it serves as the wide-field imaging complement to ALMA and the EVLA. The single focal plane is ideal for rapid, wide-field imaging systems – cameras.
#Telescope full
Its enormous 100-meter diameter collecting area, its unblocked aperture, and its excellent surface accuracy provide unprecedented sensitivity across the telescope’s full 0.1 – 116 GHz (3.0m – 2.6mm) operating range. Byrd Green Bank Telescope, or GBT, is the world’s premiere single-dish radio telescope operating at meter to millimeter wavelengths. The observatory subsystems were developed by a Northrop Grumman-led team with vast experience in developing space-based observatories.The Robert C. NASA’s Goddard Space Flight Center is managing the Webb Telescope project, and the Space Telescope Science Institute is responsible for science and mission operations, as well as ground station development.Īs the prime contractor to develop the James Webb Space Telescope, Northrop Grumman designed and built the deployable sunshield, provided the spacecraft and integrated the total system. NASA led the international partnership that included the European Space Agency and the Canadian Space Agency.
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