Lockheed Martin Space Systems Co., Sunnyvale, Calif., has been awarded a $42,880,040 modification (P00003) to previously awarded contract FA8810-13-C-0001 for dual band telemetry, tracking and communications capability for the Space-Based Infrared System Geosynchronous Earth Orbiting 5-6 space vehicles. Contractor will redesign the interfacing, software, power, thermal, and structures to accommodate the new dual band capable transponder box and cabling. This effort also adds a Unified S-Band uplink frequency and modulation scheme to the existing Space to Ground Link System L-Band uplink capability. Work will be performed at Sunnyvale and is expected to be completed by July 31, 2021. Space and Missile System Center, Los Angeles Air Force Base, Calif., is the contracting activity. (Source: DoD, 09/05/14) Gulf Coast note: Work on the core propulsion system for the SBIRS is done by Lockheed Martin at Stennis Space Center, Miss.