Lockheed Martin's new mid-size satellite platform, the LM 400, is set for its orbital debut next year aboard a Firefly Aerospace rocket, following a three-year development period impacted by supply chain issues. Designed for missions requiring more power than small satellites, the LM 400 has attracted multiple customers and will be manufactured in Denver, Colorado. Despite setbacks, including a change in launch providers, the platform aims to serve both commercial and government markets, with potential synergies following Lockheed's acquisition of Terran Orbital.