Solid-State Data Recorders for SDA’s Tranche 3 Tracking Layer Satellites

June 1, 2026

Mercury Systems, Inc.
Andover, MA
www.mrcy.com

Mercury Systems was awarded a contract from L3Harris Technologies to provide solid-state data recorders (SSDRs) for the U.S. Space Development Agency (SDA) Tranche 3 Tracking Layer satellite constellation.

L3Harris received a contract award in December to build 18 infrared satellites for the Tranche 3 Tracking Layer. These tracking layer satellites will enhance the SDA Proliferated Warfighter Space Architecture (PWSA) constellation that is designed to protect the U.S. from advanced missile threats, such as hypersonic missiles.

Mercury’s radiation-tolerant SSDRs are leveraged on all four tranches that L3Harris is developing for the PWSA Tracking Layer. Mercury recently completed delivery of SSDRs for all 18 of L3Harris’s Tranche 2 Tracking Layer satellites, after previously delivering data recorders for the Tranche 0 and Tranche 1 constellations.

With Tranche 3, L3Harris has moved to Mercury’s highest-capacity SSDR to date that delivers high performance and long-term data integrity in a 3U VPX form factor for space missions.

Visit Here