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Session 2: Current State of Military Investment in PAR

Session 2: Current State of Military Investment in PAR. Panel Lead: Dr. Jeffrey Herd (MIT LL) Panelists: Dr. Richard Wittstruck, U.S. Army PEO IEW&S Dr. Michael Pollock, Office of Naval Research Mr. Mark Longbrake, Air Force Research Lab

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Session 2: Current State of Military Investment in PAR

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  1. Session 2: Current State of Military Investment in PAR Panel Lead: Dr. Jeffrey Herd (MIT LL) Panelists: Dr. Richard Wittstruck, U.S. Army PEO IEW&S Dr. Michael Pollock, Office of Naval Research Mr. Mark Longbrake, Air Force Research Lab Panel Time Slot: 10:15 – 11:45 on Thursday, October 11, 2007 Panel Presentations: • Background and Session Objectives, J. Herd • Army’s Digital Array Radars, R. Wittstruck • R&D in Navy’s Phased Array Radar Program, M. Pollock • AF Research into PAR Antenna Design, M. Longbrake • Discussion

  2. Objectives of the Session • Provide a current snapshot of military investments in phased array radars • Identify emerging technologies and concepts from military investments that are relevant to MPAR • Identify technology gaps that must be addressed directly to meet MPAR needs • Identify collaborative opportunities to jointly increase procurement quantities and reduce cost

  3. National Air Surveillance Infrastructure ARSR-3 ASR-9 TDWR ASR-11 ASR-8 ASR-11 ARSR-1/2 ARSR-3 NEXRAD TDWR En Route Terminal Air Surveillance (ARSR-4) Range 250 nmi Beamwidth 1.4o x 2o Scan time 12 sec Weather (NEXRAD) Range 85 nmi Beamwidth 1o x 1o Scan time 240 sec Air Surveillance (ASR-9/11) Range 60 nmi Beamwidth 1.4o x 5o Scan time 5 sec Weather (TDWR) Range 100 nmi Beamwidth 1o x 0.5o Scan time 180 sec Today Timeline and Capabilities ? ASR-9 ARSR-4 1960 1970 1980 1990 2000 2010 2020 2030 • Aging mechanically scanned radars • 8 unique types for 4 different missions • Over 500 total with redundant spatial coverage

  4. ASR-8 ASR-11 ARSR-1/2 ARSR-3 NEXRAD TDWR National Air Surveillance Infrastructure Today MPAR ASR-9 ARSR-4 • Aging mechanically scanned radars • 8 unique types for 4 different missions • Over 500 total with redundant spatial coverage • State-of-the-art active phased array radars • 1 type for all missions: Multifunction Phased Array Radar (MPAR) • 334 MPARs replace 510 legacy radars

  5. Current Surveillance Radar Capabilities • Weather surveillance drives radar power and aperture size • Aircraft surveillance drives volume scan update rates

  6. Notional Full-Scale MPAR Parameters • Active Array (planar, 4 faces) Diameter: 8 m TR elements/face: 20,000 Dual polarization Beamwidth: 0.7 (broadside) Gain: > 46 dB • Transmit/Receive Modules Wavelength: 10 cm (2.7–2.9 GHz) Bandwidth/channel: 1 MHz Frequency channels: 3 Pulse length: 30 s Peak power/element: 2 W • Architecture Multiple independent beam clusters Aircraft Surveillance Non cooperative target tracking and characterization Weather Surveillance • Notional MPAR NAS system (167 full-scale, 167 terminal area) requires > 16 million active T/R elements

  7. Critical Challenges and Enablers Challenges: • Ultra-low cost array (~ $50k / m2 at S-band) • Scalable aperture sizes • Open architecture • Low operations and maintenance costs Enablers: • Highly integrated low power T/R chips • Scalable array sub-panels • Air cooled array • Design for manufacturability • High volume procurement

  8. Questions for Discussion • How will differences in mission requirements impact tech-transfer and collaboration? • Peak power • Bandwidth • Operating frequency • Production volume • Mil-spec vs commercial standards • U.S. vs overseas manufacturing • What collaborative opportunities exist to jointly increase procurement quantities and reduce cost? • How can we best determine an optimum solution for combined NWS, FAA, DHS, and DoD needs?

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