U.S. Non-Federal-Government Allocations
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MOBILE
Radiolocation
SpectrumWiki
Radio spectrum allocations
Look up a frequency or a range.
Examples: 88.5 MHz, 1350–1430 MHz, 2.4 GHz
231.999999999 GHz (231,999,999,999 Hz)
U.S. Federal Government Allocations
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Radiolocation
ITU Region 1 Allocations
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MOBILE
Radiolocation
ITU Region 2 Allocations
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MOBILE
Radiolocation
ITU Region 3 Allocations
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Radiolocation
Wiki entries
DARPA Video Synthetic Aperture Radar (ViSAR)
Proposed Use
231.5–235 GHz DARPA ViSAR
The U.S. Defense Advanced Research Projects Agency (DARPA) has launched a program to develop a millimeter wave synthetic aperture radar system that can image at a rate of at least 5 frames per second. Such a system would allow essentially real-time surveillance through clouds and dust, from aerial platforms. The initial platform is planned to be the Lockheed Martin AC-130J. Existing synthetic aperture radar systems require too much backend processing to provide real-time video data.
WRC-23 Agenda Item 1.14 Possible Adjustments to EESS (passive) Allocations
Current Use
231.5–252 GHz Review of EESS (passive) Allocations
"to review and consider possible adjustments of the existing or possible new primary frequency allocations to EESS (passive) in the frequency range 231.5-252 GHz, to ensure alignment with more up-to-date remote-sensing observation requirements, in accordance with Resolution 662 (WRC-19);"
WRC-27 study for radiolocation use
Proposed Use
231.5–275 GHz WRC-27 study for primary radiolocation allocation
WRC-27 agenda item 1.8:
to consider possible additional spectrum allocations to the radiolocation service on a primary basis in the frequency range 231.5-275 GHz and possible new identifications for radiolocation service applications in the frequency bands within the frequency range 275-700 GHz for millimetric and sub-millimetric wave imaging systems, in accordance with Resolution 663 (Rev.WRC-23)
to consider possible additional spectrum allocations to the radiolocation service on a primary basis in the frequency range 231.5-275 GHz and possible new identifications for radiolocation service applications in the frequency bands within the frequency range 275-700 GHz for millimetric and sub-millimetric wave imaging systems, in accordance with Resolution 663 (Rev.WRC-23)