RASAR Program Real-time Autonomous Synthetic Aperture Radar Objective: Develop a <25 lb podded quad-pol L-band synthetic aperture radar (SAR) capability for Shadow-200 or similar platform Tx, Rx, image formation and exploitation performed in pod Expand SRP architecture to include RF imaging L-band day/night all weather imaging; X-band extension in FY12 Transition technology to STUAS beginning in FY12 Value to Naval Warfighter: Tactical SAR mission support Real-time-rate image formation both from ground and airborne processors CIED-specific image processing and detection capability The Technology: Digital, module-based, RF collection and pre-processing system Wide-beam operation for multi-look image enhancement, persistent surveillance, and simplified system design Quad-polarization RF data collection and airborne pre-processing Support for automated change-detection CONOPs Air+ground image formation enables back-projection processing Similar/Related Projects: Leverage SRP payload development TRL: Current: 5 Major Milestones 3QFY11, Non-podded quad-pol configuration enters flight testing 3QFY12, Full podded quad-pol configuration enters flight testing Approach: Direct digital Tx & Rx system to collect and store full digital RF waveform for ground post-processing Airborne digital spotlighting to reduce RF data volume and enable pulse data transmission across standard CDL datalink Enable real-time rate airborne image formation (up to 512 x 512 pixels) and transmission to disadvantaged forward user LRIP Cost Estimate: $400k for complete RASAR system including RASAR cards, SRP chassis, pod and ground image exploitation computers Current Program Plans: X-band SAR modifications to be completed 4QFY12 STUAS system hardware migration to begin 1Q FY13 POC: Dr. Thomas J. Walls, Dr. Michael L. Wilson; Naval Research Laboratory

RASAR Program Overview RASAR: Real-time Autonomous Synthetic Aperture Radar – Enhances SRP Open Architecture to include a SAR capability – Migrated from existing SAR system, NuSAR (NRL UAS Synthetic Aperture Radar) RASAR program goals: – L-band capability Day-night all-weather imaging Optimize system performance in IED signature detection Provides moderate foliage penetration capability Mitigates UAS UHF antenna accommodation and spectrum interference issues Spectral sweet-spot for “WAB” operation – Implement Wide Azimuth Beam (WAB) architecture Demonstrated performance in counter IED mission Enables multi-aperture image enhancement Persistent surveillance and area survey operational modes Simplified system design to meet UAS SWAP requirements – Quad-polarization collection capability – Simultaneous HH/VV collection in podded configuration – Support change-detection (CD) CONOPs – Rapid add-on capability for existing theater assets Currently in flight testing L-band SAR, Urban Site 2

Pod SWaP and Interfaces Pod developed and flight tested Chassis developed and flight tested RASAR Pod – Dimensions: 8” diameter, 45” long – < 25 lbs weight-on-wing – 150 W average power consumption Interfaces – 28V power – Ethernet (for data link) L-Band SAR Antenna Electronics Chassis Ram Air Scoop GPS/INS Wing Mounts 8 ” Diameter 45” Length Arbitrary waveform generation provides for a flexible band allocation Primary frequency rangeExtended frequency range 1215 to 1390 MHz 25 W peak power (<5 W average) 1110 to 1390 MHz 25 W peak power (<5 W average) 3