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EO/IR sensor on RQ-4 Global Hawk

AeroFranz

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Does anyone know the designation or any dimension details on the EO/IR sensor on the Global Hawk? the usual searches didn't even come up with a name for the system, other than it's part of the integrated sensor suite.
Thanks!
 

flateric

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KJ_Lesnick

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Is the Global Hawk using this particular kind of equipment?

http://blog.wired.com/defense/2009/02/gigapixel-flyin.html
 

flateric

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not. GH uses Kodak one

The Raytheon-supplied EO/IR system, mounted in the chin of the Global Hawk, combines a Recon/Optical camera with a third-generation Raytheon IR sensor. The EO system uses a commercial, 1,024 x 1,024 pixel Kodak digital silicon charge-coupled device (CCD) camera, while the IR sensor has a 640 x 480 pixel 3-5μm indium antimonide detector derived from Raytheon’s common-module forward-looking infrared (FLIR) system.
Both EO and IR sensors are fed by a fixed 1.75m focal-length reflecting telescope with a beam splitter and 254mm reflecting mirror that forms the main area of improvement in the Block 20. “We’ve not changed the camera unit. The enhancement is a change in the material of the mirror, which can be more finely polished, and the introduction of a real-time precise focus capability,” says Mohr.
Neither system has the 6,000-plus pixel width needed to provide the required 1m resolution in a single exposure, so the telescope scans continuously sideways while an internal mirror back-scans to freeze the image on the sensor. This “step-stare” approach means the mirror returns to the start point every one-thirtieth of a second, while the small patches are assembled to generate a larger picture. “This means the system has a 30Hz capability, which is practically a video,” he adds.
The entire system uses a gimbal mount derived from a Raytheon AAQ-16 FLIR turret that can roll ±80° or move ±15° in pitch and yaw. Stabilised to 3mrad, compared with the more normal 20mrad, the system can cover up to 104,000km2 a day in wide-area search mode, or generate up to 1,900 4km2 spots in spot mode. Dual-band coverage is provided in the visible (0.4-0.8μm) and IR (3.6-5μm) wavebands. Imagery from the sensor suite is sent via the Ku-band link originally developed to transmit at up to 50Mb/s, though projected performance now ranges between 1.5Mb/s and 47.5Mb/s.

http://www.flightglobal.com/articles/2006/07/04/207539/global-reborn.html
 

AeroFranz

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Thanks a lot Grigory! I searched the Raytheon website but this detailed brochure wasn't there. You are obviously better than i am at searching or you have better resources (probably both!) ;D
 

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