The document discusses the OSA 3350 SEPRC optical cesium atomic clock, highlighting its advancements over legacy magnetic cesium clocks and its suitability for critical infrastructure applications such as telecommunications and power utilities. It emphasizes the clock's superior performance, reliability, and long operational lifespan, making it an essential backup for GNSS systems. The innovation aims to enhance national resilience and address risks associated with jamming and spoofing in positioning and timing services.