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MISSION MDA is developing and executing a layered sensors archi-tecture to provide continuous sensor track and discrimina- tion of ballistic missiles in all phases of flight. The program includes acquiring, fielding, testing, and operating BMDS sensors and using data from non-MDA sensors, such as overhead non-imaging infrared (IR) sensors. Together these sensors increase the probability of successful intercept by expanding the engagement window of opportunity and enabling additional engagements. PrOGrAM DESCrIPTION The BMDS Sensors program responsibilities include the AN/TPY-2 radars (configured for forward-based or termi- nal missions), the SBX radar, and BMDS-related operations for upgraded Air Force UEWRs, and the upgraded Air Force Cobra Dane (CDU) radar. Future sensors will include the European Midcourse Radar. Sensor activities include research, development, testing and evaluation; planning for sensor deployment; life cycle support; and operating sen- sors as part of the BMDS. AN/TPY-2 Radars: The forward-based AN/TPY-2 radars provide improved homeland and regional defense. The first forward-based radar was declared operational at Shariki, Japan. A second forward-based radar is undergoing testing at Vandenberg, AFB, CA. Two other radars will be deliv- ered in FY08 and FY09, respectively. The terminal mission radars are integrated into the THAAD Weapon System. One THAAD radar is at the Pacific Missile Range Facil- ity (PMRF), Kauai, HI to support THAAD flight tests. A second radar is at White Sands Missile Range (WSMR), NM for Limited Environment Testing and New Equipment Training prior to fielding THAAD Fire Unit #1. Additional AN/TPY-2 radars are being procured for the THAAD program. Ballistic Missile Defense System Sensors Sea-Based X-Band Radar (SBX): The SBX radar is mount- ed on a mobile, ocean-going platform that can be reposi- tioned worldwide. The radar will provide a unique capability to detect, track, and discriminate complex and challenging threats. The radar is currently undergoing BMDS-level test- ing to demonstrate operational capability. Upgraded Early Warning Radar (UEWR): Three Air Force Early Warning Radars (EWRs) are being upgraded to mod-ernize radar hardware and software and to integrate the ra-dars into the BMDS. The upgrades will improve midcourse BMDS sensor coverage while retaining legacy missile warn- ing and space track missions. Radar systems at Beale, CA, and Shemya, AK, have already been upgraded and incorpo-rated into the BMDS. The upgrade to the Fylingdales, UK radar will be completed in FY08. The Thule, Greenland site will be integrated into the BMDS in FY10. External Sensors: MDA established the External Sensors Laboratory (ESL) at the Missile Defense Integration and Operations Center in Colorado Spring, CO to evaluate the benefits of incorporating external sensors into the BMDS framework. Initial efforts are focused on space assets, which could contribute to improved tracking, cueing, dis- crimination, and situational awareness. European Midcourse Radar (EMR): The EMR upgrade will replace obsolete hardware and firmware with proven components used in AN/TPY-2 and SBX radars, substan- tially increasing commonality across the MDA X-band radars. The upgrade will start in FY09 with the EMR being incorporated into the BMDS in FY12. CONTrIBUTIONS TO THE BMDS BMDS sensor architecture results in an increased probabil- ity of successful engagement and allows advanced con- cepts that preserve interceptor inventory. Future initiatives include fielding improved discrimination algorithms, fusing sensor data, and providing improved kill assessments. These efforts will conserve sensor resources and improve the track and discrimination data provided to BMDS weapon systems and reduces the number of target engage-ments. Sensor-to-shooter functionality is verified through BMDS-level testing. 2007 ACCOMPLISHMENTS • Continued operations of the forward-based AN/TPY-2 radar in Japan as part of the BMDS • Supported successful THAAD intercepts on two flight tests • Supported Aegis interoperability testing with AN/TPY-2 (Terminal Mode) • Completed upgrade to Beale Early Warning Radar • Completed SBX winter shakedown testing • Demonstrated ability of ESL to provide precision cue to forward-based AN/TPY-2 radar Majority of work for BMDS Sensors is performed in the green colored states.