Haystack Long Range Imaging Radar (LRIR) (U)
(U) The Millstone Haystack complex consists of two radars that share hardware and power which precludes simultaneous operations. The two radars are the Haystack Long Range Imaging Radar (LRIR) and the Haystack Auxiliary Radar (HAX). These radars support missions for USSPACECOM, the National Science Foundation, and for NASA. Their primary function is for deep space imaging of foreign and domestic satellites and orbital debris. The radars image every new foreign space launch in near earth, and image domestic satellites in trouble.
Description User Impact Programmatics Images Related Initiatives Related Requirements Related Categories Road Map Placements Additional Hotlinks Lead Office POC
(U) The LRIR takes two-dimensional images of earth satellites by processing highly stable, coherent signals to extract target return range and doppler information. The radar is capable of tracking and imaging near-earth satellites, 200-4,000 km altitude, as well as deep space objects out to 40,000 km range and beyond. The maximum tracking rate of the Haystack antenna is 2 degrees/second, and this sets the limits on observation of near-earth satellites, especially those passing nearly overhead. The limitation on deep space objects is their size: a one square meter radar cross section at 40,000 km is roughly the detection threshold of the radar. The radar operates at 10-GHz center frequency and transmits over a broad range of pulse widths and pulse repetition frequencies, including a 1-GHz linear FM pulse which, when compressed, is used for radar imaging. The radars also provide detection of objects in space and gather information about their estimated size, velocity, altitude, and direction of travel.
User Impact (U):
(U) Loss of this capability would have a significant impact on the Space Surveillance Network (SNN).
(U) Organizations and Funding:
- (U) USSPACECOM: Funding Source.
Name Title Millstone Complex Millstone Complex This Table Is Unclassified.
Related Initiatives (U):
Name Title Millstone-Haystack Millstone Haystack This Table Is Unclassified.
Related Requirements (U):None.
Related Categories (U):
Name Title Contibuting Sensors Contibuting Sensors This Table Is Unclassified.
Road Map Placements (U):
Name Title SPACE CONTROL: S.S. NETWORK SPACE CONTROL: SPACE SURVEILLANCE NETWORK This Table Is Unclassified.
Requirements, Funding and Additional Hotlinks (U):
Name 1997 Space Surveillance Dev Plan This Table Is Unclassified.
Lead Office (U):
Point of Contact (U):
Date Of Information (U):
(U) 24 September 1998
(U) Road Map Production Date: 12 July 1999
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